DataGridView ImageCell Description

Windows Forms Data Controls and Databinding

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    - Modal Form Hi all, I need to show a form as dialog to a parent window only not modal to the entire application. see if i have three forms form1, form2, form3 first i showed form3, then form1 and set form2 as modaldialog from form1 , now i cannot access form3 also without closing form2, ie form2 is modal to the entire application Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Why to double click SQL DB File for connecting. Hi, I have added a SQL Database in my Visual Studio 2005 (C#) project. I am accessing it with AttachDbFilename=|DataDirectory|........... and it is working fine as I can access the database when i run the application. But the problem occurs when i close the project and reopen it in new visual studio instance and starts debugging, it gives exception as it doesnot connect to database. Then i double click the already added SQL Server DB file being shown in my solution explorer and again start debugging then it works fine and easily connects to DB. Another thing which I experieced is that when i open the new instance of visual studio for above mentioned task. Then my SQL Server DB is not shown in Server Explorer under current connections. But when i double click my SQL Server DB in solution explorer then it start showning that DB in current connections. Environment : Visual Studio 2005 SQL Server 2005 Express Edition Windows XP SP2 Thanks Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Web browser problem Hi, I am creating a simple htm file on disk that points to a particular flash file (swf). But when I point the url of the web browser to this file, it loads but the place where the swf file should show up, only shows the square X mark, meaning the file couldn't be found or be displayed. When I run the file in windows by double clicking, it asks me if I trust the file (using the information bar), and when I say Allow Blocked content, it shows the swf. Is there a way to turn this off, or work around this I am not even sure if this is the problem. Because I see various software that does this, like wink. It opens an htm file showing a particular swf. Thanks alot, aw Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Assigning icon from default settings on target machine I am using VS 2005 to create a setup project for my application. I have added a shortcut in the user's Start menu for the supporting documentation for the application, which is a PDF document (stored in the user's Application Folder in Program Files). I want the shortcut to use the default icon on the target machine for PDFs (they might be using Adobe Acrobat, PDFComplete, not have a PDF viewer, etc etc). Is there any way to do this I know how to assign an icon that I include in the setup project (I've done this for the shortcut to the application .exe), but I don't want to make any assumptions about the type of PDF viewer installed on the target machine, so I'd rather pick up an icon from their default settings. Thanks Claire Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Textbox value lost while validating Hi, I am having a problem implementing databinding in my .NET 2.0 app. I have a number of controls on a user control (the user control's autovalidate property is set to 'disabled'. I fill in the form fields, and try to save the data. The application calls ValidateChildren() on the user control, and my Validating event handlers fire as expected. But somewhere during this process (while the validating event handlers are running) one of my textboxes loses its value (it's reset to empty string). So, by the time its own validating event handler runs, it fails because this is a required field. The really odd thing is that if I then try to save this again, everything runs as expected. This is a sample of the code that adds the databindings to my controls: Code Snippet private void CreateControlDataBindings(customBusinessObject b) { this._personBindingSource = new BindingSource(); this._personBindingSource.DataSource = b; this.cboTitles.DataBindings.Clear(); this.cboTitles.DataBindings.Add(new Binding("SelectedValue", this._personBindingSource, "Title", true, DataSourceUpdateMode.OnValidation)); this.txtForename.DataBindings.Clear(); this.txtForename.DataBindings.Add(new Binding("Text", this._personBindingSource, "Forename", true, DataSourceUpdateMode.OnValidation)); //this is thw one which loses its value this.txtSurname.DataBindings.Clear(); this.txtSurname.DataBindings.Add(new Binding("Text", this._personBindingSource, "Surname", true, DataSourceUpdateMode.OnValidation)); } And these are my validating event handlers: Code Snippet private void cboTitles_Validating(object sender, CancelEventArgs e) { e.Cancel = !this._validationManager.ValidateItemSelected(this.cboTitles, "A title is required."); } private void txtForename_Validating(object sender, CancelEventArgs e) { e.Cancel = !this._validationManager.ValidateNullOrEmpty(this.txtForename, "A forename is required."); } private void txtSurname_Validating(object sender, CancelEventArgs e) { e.Cancel = !this._validationManager.ValidateNullOrEmpty(this.txtSurname, "A surname is required."); } The first two both run as expected (i.e. they don't cancel the event), then somewhere between the 2nd and 3rd handler, the txtSurname text value is reset. I notice a slight pause in the application before this happens- almost as if the application is trying to push some data back to the datasource, and failing for some reason. The business object I am working with contains both a Forename and Surname property, so the problem is not that it can't write the value back to the property I have bound the control to. If anyone has any suggestions for how to make this work, I would extremely pleased to hear them, as informing the prospective users that they will have to click the save button twice would not go down terribly well. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - DataGridView, CheckBox fields and Strongly Typed datasets.... I have run into a particularly irritating problem and I am hoping that there is a simple solution. I have a couple of DataGridViews on tabs in a tab control. The DataGridViews have a mix of Check boxes and text cells in them. The Datasources are pointing to tables in a strongly typed dataset. In one case I have a non-Databound column ( a check box ) and in the other grid all fields are databound. The problem that I am seeing is that my column ordering is not staying the way I put it. Something that either I or VS 2005 is doing is putting all the checkbox fields at the very front ( far left ) of the datagrid. This gets very frustrating as it happens on the grids regardless of whether or not I happen to be actively working on them in VS. More importantly though there is the strong possibility that I will yet again get my columns reordered for me just prior to a release and the client will get it that way. Anyone have any clue why this may be happening Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Find a window control at a point on the screen How do I find a control (such as a text box) from a window running in a separate process based on an X,Y screen coordinate Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - MaskedTextbox and allowing only valid int input I’m trying to setup a MaskedTextbox on a form to allow for only valid int input, but can’t seem to get something that I’m happy with. What I need is that the user enter something that’s entirely numeric (no decimals or negative signs), a minimum of 1 digit and a max of 4 digits. I’ve set the following properties: Mask=”0000”; ResetOnSpace=false; TextMaskFormat=MaskFormat.ExcludePromptAndLiterals;, and if you type in “323_”, or “_323”, its fine, and it doesn’t allow the user to press space. But, if you clear the field and type 3 (right cursor over) 23 to produce “3_23”, it obviously does not parse as a valid int. I then decided to try setting the maskedTextbox1.ValidationType = typeof(int); and setting up a typeValidationCompleted event, but unless the whole mask is completed (4 digits), it fails. How can I get this to work in my favor Its almost to the point that I just roll my own based on the standard textbox. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - CheckedListBox DataSource property Hello As mentioned in the documentation, it is not recomanded to used the DataSouce, DisplayMember and ValueMember properties. Does anyone have an idea why Thanks, Gil Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - DataGridView Scrollbar Hi, I have a datagridview control on a form that contains lots of rows populated from an SQL database (done in code in a grid refresh subroutine). I have a timer control that updates the grid every 10 secs. The problem I have is that if I am in the process of scrolling down the grid and the timer event fires off a grid refresh, the grid resets the grid location and scrollbars. What I want to be able to do is set a flag on a mousedown event of the scrollbar and more importantly reset the flag on the mouseup event. This will enable the grid refresh routine to decide whether to refresh or not. However I don't seem to be able to do this as the events do not exist. The Scroll event allows me to set the flag to disable the refresh but I don't seem to be able to find a similar event to allow me to enable the refresh again. Can anyone help I am using VB2005.net Cheers Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Parent, child forms check if open or closed Hi all, I'm new to c# and currently working on a project containing mdi forms. This is how the project is layed out. Parent form is called Street_Index. This contians a menu strip which can open 2 different forms. * Street_Search * Office_Search Within the Street_search form there is a button that i click that returns the results in another form called Search_Results. Search Results contains a grid and on double clicking the column of the grid it returns the results of that row back to Street_Search form which displays them in textboxes, grid, combobox, etc.. Within the Office_Search form there is also a button that opens the Search_Results form and then from there you can double click on the grid within Search_Results and open up Street_Search form which will display the results as previous. Now onto the question. What is the cleanest possible way to check to see if a childform is open or not and if it is refresh it or bring it into focus Thanks in advance Take care all. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Suddenly I'm getting this error: The form referred to itself during construction from a default instance Hi, I'm getting the error below when I try to run my project. It's never happened before, and I don't understand what's caused it. Can anyone help please Thanks, Louise System.InvalidOperationException was unhandled Message="An error occurred creating the form. See Exception.InnerException for details. The error is: The form referred to itself during construction from a default instance, which led to infinite recursion. Within the Form's constructor refer to the form using 'Me.'" Source="FrontierIS" StackTrace: at FrontierIS.My.MyProject.MyForms.Create__Instance__[T](T Instance) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 190 at FrontierIS.My.MyProject.MyForms.get_frmData() at FrontierIS.My.MyApplication.OnCreateMainForm() in D:\contacts\FrontierIS\My Project\Application.Designer.vb:line 35 at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun() at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel() at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine) at FrontierIS.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81 at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - datagridview - testing values of an unbound column Hi there. I have a datagridview that I populate via a table adapter and everything is working just fine. Now i'd like to give the user the option of: selecting multiple records in the grid by checking a checkbox. this checkbox is available for each row of data and i created it by adding an unbound column. What i'd like to do is enable a button on the same form only if one or more records have been selected by the user. how do i do this I was thinking about using the event: Private Sub DataGridView1_CellContentClick( ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick End Sub but this event can potentially be fired many times and for any column that's selected. Any suggestions Also, what's the easiest way to allow the user to edit the data for a given record I need to do another query when they request an edit because the current datagrid doesn't show all the details for the record. I intend to launch a new window to do this. Please and thanks. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - how to host different controls in the same column in DataGridView control Hi, I am trying to create a datagridview. And in one column i want to have different type of cells (hosting different editing controls). For example, in the same column first cell shall host a combo box control, second cell shall host a text box control, third cell shall host DateTime picker control, another with Colorpicker control, etc. if i follow the host controls in windows forms Datagridview cell and c urrently if i change the cellTemplate property of DataGridViewColumn to calendarcell, then all the cells in that column become calendar cell. But instead i want to have a different control, for example colorpicker, in the next cell ie the one below this. Please advise how to achieve this using datagridview cell. -Madhu. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Removing multiple items in a ListView "at the same time" Hi all, Suppose we have 5 items in the ListView: "Alpha", "Bravo", "Charlie", "Delta" and "Echo". When we execute RemoveAt(0) followed by another RemoveAt(0), the first two items got removed. If we execute RemoveAt(0) followed by RemoveAt(1), "Alpha" and "Charlie" got removed. What I want to achieve is: I can multi-select items in the ListView to decide which items i'd like to delete. For example, I select "Alpha" and "Delta", so the index 0 and 3 are stored in SelectedIndexCollection. Then I enumerate this collection to delete these two in one run. At this time, if I run RemoveAt(0) first, the index of "Delta" will be changed to 2. Can I delete multiple items "at the same time" in the collection without having to mess with the indices Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - How to lock a control on a design form Hi there, I've created a design form at runtime using "System.ComponentModel.Design.DesignSurface" and cousins. I now want to lock individual controls on the form depending on conditions. I know I can do it this way: TypeDescriptor.GetProperties(myControl)["Locked"].SetValue(myControl, true); but this seems irregular. Is there a more mainstream way or is this it. Thanks. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Usefullness of any event Hi all, Visual Basic was released in the 1990's and immediately became hugely popular in corporate America because its new Event Driven design allowed programmers to deliver huge financial value to organizations. Event D riven is a key concept there, it seems to me. I have a theory today, as follows, for Windows Forms 2.0: THE VALUE OF AN EVENT TO A PROGRAMMER IS USUALLY INVERSELY RELATED TO THE NUMBER OF TIMES IT FIRES. For example, if, when a Form opens, its form_load event fires once and only once, that is a good thing for a programmer. But if it fires twice, then the event is not so useful. If it fires 6 or 7 or maybe 10 times every time the form is opened, then its value is even less. Thank goodness, in Windows Forms 2.0, the form_load event still fires once and only once. But next, take for example a ComboBox's SelectedIndexChanged Event. If, when we bind a form for example, the ComboBox's SelectedIndexChanged Event fires once, and only once, then it can be very valuable to a programmer. But if it fires twice, at unpredictable points, its value to a programmer is greatly diminished, it seems to me. And if it fires, 3 or 4, or maybe 7 or 8 times, unpredictably, its even more useless. Unfortunately, in Windows Forms 2.0, the SelectedIndexChanged fires multiple times, somewhat unpredictably to boot. Or take for example a simple button click. Hopefully, we programmers are confident that whatever code we put in a button's click event will only be processed once, and only once, when the user clicks the button. What if the button_click event fired not once, but 2 or 3, or maybe a dozen times, and not just when the user clicked, but during form_load and binding Would we want to use it This is only a theory of course. Can anybody see any weakness in this theory, or ways to state the theory more correctly Any thoughts or ideas will be appreciated. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - column caption i'm trying to use the column caption but it didn't work. i'm currently using microsoft visual studio .net 2003. i check the online tutorials and did the same, but the caption never turn up at the datagrid. can anyone advise me on this below is my codes. another issue is that, is it possible to change the colour of columns with using tablestyle count = Db.Observation; counter = 1; year = Db.year; mth = Db.mth; DataColumn Quantity; for ( int i=0; i<count; i++) { if (mth > 12) { year++; mth = 1; } Quantity = new DataColumn(year+" / "+mth, typeof ( int )); Quantity.Caption = "Data " + counter; productTable.Columns.Add(Quantity); counter++; mth++; } Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - How do I reference a control's properties? I am new to VC++ but not to programming. I am trying to change the Text property off a textbox when I click a button. However I cannot determine the proper syntax to reference the text field. Form name - Form1 Textbox name - Textbox1 Button name - Button1 In Button1.Click I tried the following - all of which fail compile Form1::Textbox1->Text = "Hello World" ; /* error C2227 */ Form1::Textbox1.Text = "Hello World" ; /* error C2228 */ Textbox1.Text = "Hello World" ; /* error C2065 */ This can't be that hard, but I can't find where it is documented. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Record Locking and Transactions in Strongly Typed Datasets Hi, I have a form with 4 tables displayed in different tabs, all coming from the same dataset. Here's part of the Form.Load event so you know what I mean: Code Snippet Me.taPaymentsApplied.Fill(Me.DsPaymentProcessing.PAYMENT_APPLIED) Me.taNewPayment.Fill(Me.DsPaymentProcessing.PAYMENT, Me.txtCardID.Text) Me.taExistingPayment.Fill(Me.DsPaymentProcessing.EXISTING_PAYMENT, Me.txtCardID.Text) Me.taInvoices.Fill(Me.DsPaymentProcessing.INVOICE, Me.txtCardID.Text) What I need to do is lock all the records that are opened in the latter 3 lines and begin a transaction. Then allow the user with the lock to add records to the first table and modify contents of the next 3. I'd prefer that other users simply not be allowed to even view these locked records. Saving needs to be in a transaction, meaning either save ALL 4 tables or fail on all. I can do this is I do everything programmatically, but I'm a bit lost when it comes to using objects from my Datasource window. I'd appreciate any help. Thanks Kia Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - hide and show a process??? Hi all. How can i make a process (server.exe) hide and show with a button while is running thx in advance. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - TreeView Comtrol: Add buttons to nodes in TreeView control I am now using TreeView in my web page. I want to add some buttons next to some of the nodes in the treeview. The button should be aware of the value of its corresponding node in the tree. Is there any good way of doing this Thanks! Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Access Denied Reading Registry Hello. I have been searching everywhere for an answer, but can not find any information on this topic. My problem is that I built an application using the VB. NET 2005 VS compiler and writing my application using VB. NET 2005 (Framework 2.0) language/architecture and every time I try to read HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services key, I receive an Access Denied error. So my question is, what do I need to do to be able to run this application automatically on any machine without having to force the user change his/her configurations I am looking for a programmatic way to do this, if possible. All help is certainly appreciated. Thanks in advance. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - How do I Find The Product Code? This is driving me crazy and it must be simple. I am trying to find the product code so I can author manifests for installing MSDE. How do I find product codes for things I want to install I must be missing something easy. Do we just make them up For example here is the product code for SqlExpress ProductCode="Microsoft.Sql.Server.Express.1.0" Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Menustrip reading XML Is there any way to bind the menustrip control to a XML file so it loads its items on runtime similar to the TreeView on ASP.NET Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Can we Add ListItem objects to ListBox ? Dear friends i have basic doubt that is can we add ListItem's to ListBox (or) is ListItem's are only for ListView any suggetions Thanks Ranadheer Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Using the Windows password in my application I have a WinForms C# application for which I currently have two methods of login - either the user enters their password when they log in, which I store in my SQL 2005 db encrypted, or I just let them in based on their windows login id. In both cases I do not ask for a username, I get this from their Windows network login. What I would like to do is something that I have seen other applications (Lotus Notes) do. If your application password is the same as your windows password, it just lets you in, but if they are different then you must enter the application password. I am not worried about the db login, just the application login. I have been searching for an example of this, but I have not had any luck. If this question has been already asked and answered, my apologies, but please point me in the right direction. Later I will need to do the same thing in an asp.net application, but right now my problem is only winforms. Any help would be appreciated. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Bring to Front Form Problem Hello, I have the following problem: I have a main form that has some children forms which each one is shown like childForm1.Show(mainForm); It seems that i cannot bring the main form in front of a child when both of them are opened. Does it exist a way to achieve this Thanks in advance for any comments. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - How do I allow the user to enter a negative number in a column on a grid with validation? This is my 1st C# VS proj and I'm having some difficulty validating data entered on a column. HEre's the code. if (dgExtents.Columns[e.ColumnIndex].Name == "Sequence" ) //number is currently < 300 { dgExtents.Rows[e.RowIndex].ErrorText = "" ; int newInteger; if (dgExtents.Rows[e.RowIndex].IsNewRow) { return ; } if (! int .TryParse(e.FormattedValue.ToString(), out newInteger) || newInteger < 0) { e.Cancel = true ; dgExtents.Rows[e.RowIndex].ErrorText = "the Sequence value must be a number" ; } if ( string .IsNullOrEmpty(e.FormattedValue.ToString())) { dgExtents.Rows[e.RowIndex].ErrorText = "Sequence is a required field" ; e.Cancel = true ; } Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Programatically trigger keyboard shortcut I want to trigger a behavior for which a third party component provides a keyboard shortcut. The user can trigger this behavior with CTRL+SHIFT+V, but I want to programatically trigger this behavior in certain circumstances. Any ideas Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Dump controles to image /saving to image I have a SplitContainer with two custom controls in it, what I'd like to do is to dump the whole thing to an image, like if you take a screenshot and cut away all but the SplitContainer. I've read somewhere that you could do something like this by creating an image and the get an Graphics object from the image and let the controls draw on that. I understand that since the SplitContainer is a standard control this might not be possible, but I can change the two controls if necessary, just as long as I can find a way to specify where the controls will draw on the image. My problem is that after looking at System.Drawing.Image and not having found any way to get a Graphics objects from I'm not sure where to start, so any pointers, example, or such would be much appreciated. Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms
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    - Value, Text pair in combo box Hi It is possible to set "Value , text" pair in combo box in vb.net 2005. Thanks in Advance Prash Tag: Windows Forms Data Controls and Databinding DataGridView ImageCell Description Windows Forms

akin_l

Hi,

I have a dataGridView control on the form and it is not data bound. I

have an image cell(whenever required) which is needed to display

the image as a thumbnail. I want to display a description next to the

image. I have tried using the 'Description' property, but it doesnot

seem to work. I don't have an image column. I just create an image

cell when needed.

Thanks!

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Re: Windows Forms Data Controls and Databinding DataGridView ImageCell Description

Bob zhu - MSFT

Hi :

how you handle adding image cell without image column

but for your question I think you can do it in cellpaint event of datagridview ,

paint image and draw string using DGI+

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Re: Windows Forms Data Controls and Databinding DataGridView ImageCell Description

Zhi-Xin Ye - MSFT

You can create a UserControl to host an Image and a Label, and add thisUserControl to the Controls property of DataGridView, and diplay it where you want. check this thread for example: http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=1420626&SiteID=1

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