set the date picker value to null

.NET Base Class Library

- Previous
  - 1
    - Problem on View... Hi, I already know how to retrieve data from a database to dataset...but I do not know how to use tabledirect object... here is my code and the error message I got after running the application cmdCommand = New SqlCommand(pViewName, cnConn) .CommandType = CommandType.TableDirect Message="The CommandType enumeration value, 512, is not supported by the .Net Framework SqlClient anybody Please help me... tnx Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 2
    - FtpWebRequest GetResponse throw The server committed a protocol violation :( OK. I configure the extarnal ftp to the same configuration as my and exception still there! URL with login/pass: ftp://throw:throw@devgroup.mephist.ru The server banner message contains russian symbols. FTPWebRequest is dead :( Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 3
    - Find and Replace with Lookup or Function Call Check out this forum's top announcement post .Net Regex Resource Reference which has referential information geared towards all levels, expert to beginner, where you can find links to tools to use and how-to code examples. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 4
    - new Thread questions The Thread(ThreadStart, Int32) constructor is actually documented as throwing an ArgumentOutOfRangeException if the thread stack size is less than 131,072 (128k)... Try just calling the Thread(ThreadStart) constructor instead (i.e. delete ", 5000" where you create the new thread) and see what happens. When the delegate completes the thread terminates... Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 5
    - ILMerge and public entities in dependent class libraries Thanks I should have paid more attention to the manual. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 6
    - How to detect if MS-Out application is open? Does this has a version in Word VBA How to detect Outlook is open and open it if it is not. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 7
    - Ways of Invoking webservices(using build script) Hello Everyone, I am a novice when it comes to advance ways of invoking web service.Saying this I move on to my scenario and then my question. I have a solution with two projects one is a webservice and another is a class libray. There is an exe (Main.exe) that is responsible for hosting the application (like an exe used in framework based development). This Main.exe is the entrypoint application. The we bservice is a test webservice.During development time I set the webservice as a start-up project,and set the start external program to point to the above exe.Loose coupling is priority as I dont want to add any web reference to the Main.exe proj. This way VS starts my webservice and the webservice starts the exe.This is all fine as long as it's development. But after running a daily build any user would only run the Main.exe,now is ther a way that I can invoke my webservice after/before the entrypoint application is run. My question is when people use webservices during build time,how do they bring up their web services.Which lets assume should already be running befor the Main.exe is invoked. Are there any batch files that need to be run in the build script is there any way of using the ASP.NET webserver to invoke this Thanks in advance, Warm Regards, Chetan Pai Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 8
    - Very slow over internet, fine on intranet This was just a benchmark test of course, but I cant understand why its so horrible when running through ISA only.... Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 9
    - Compact Framework SqlClient classes don't inherit from System.Data.Db* classes? To be quite honest, I don't really know. Look at the following from the .NET Compact Framework Data Providers main help page: "Core elements in the ADO.NET architecture are the .NET Compact Framework Data Provider for SQL Server CE (System.Data.SqlServerCe) and the .NET Compact Framework Data Provider for SQL Server (System.Data.SqlClient). These data providers are used to connect to, execute commands in, and retrieve results from databases in Microsoft SQL Server 2000 WindowsR CE Edition (SQL Server CE) and Microsoft SQL Server , respectively. System.Data.SqlServerCe is used for programming Windows CE .NET-based applications that are semiconnected to or disconnected from SQL Server databases. System.Data.SqlClient is used for programming Windows CE .NET-based applications that have direct connections to SQL Server databases (however, these applications must have network access)." The way I read this, the SqlServerCe classes are for Sql2000 while the SqlClient ones are for Sql2005. OR, one can read it such that SqlClient is for connecting to databases that are not on the device (via the network). In my scenario the database is definately on the device. i don't particularly care which I use as long as I can program against the generic abstract classes (DbConnection, DbCommand etc)... Can you possibly clarify Thanks Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 10
    - Deployment setup project cannot access 64bit registry I've created a 64 bit installer using VS2005. Installer T argetPlatform property is set to x64 . I have a Launch Condition that looks for a registry key which contains a path to a 64bit area required by my application. The Registry key is "HKLM\Software\Microsoft\MSDTS\Setup\DtsPath", which contains "C:\Program Files\Microsoft SQL Server\90\DTS\". There is an identical Registry Key at HKLM\Software\Wow6432Node\Microsoft\MSDTS\Setup\DtsPath (the 32bit registry area) which contains "C:\Program Files (x86)\Microsoft SQL Server\90\DTS\". My Launch Condition always finds the key under the Wow6432Node registry, giving me the path under Program Files (x86). How can I instruct the installer to look under the 64bit registry area Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 11
    - Cropping a System.Drawing.Image Thanks for the reply. I see where I have gone wrong in the above example now. The line resultGraphics.DrawImage(sourceImage, 0 , 0 ) should read resultGraphics.DrawImage(newImage, 0 , 0 ). I wasn't aware that DrawImage applies the image to the Bitmap or that the Bitmap could be saved to a Stream. So I now have: ... Public Function CropImage( ByVal img As Image, _ ByVal height As Int32, _ ByVal width As Int32) As Image Dim outImage As Image Dim ms As MemoryStream Try Dim sourceImage As Bitmap = New Bitmap(img) Dim resultImage As Bitmap = New Bitmap(width, height) Dim resultGraphics As Graphics = Graphics.FromImage(resultImage) resultGraphics.DrawImage(sourceImage, 0 , 0 ) ms = New MemoryStream() sourceImage.Save(ms, img.RawFormat) outImage = Image.FromStream(ms) Return outImage Catch ex As Exception Throw ex Finally If ( Not ms Is Nothing ) Then ms.Close() End Try End Function ... I'll give this a try this afternoon and let you know how it works, but it looks like its exactly what we're after! Thanks, Stephen. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 12
    - Can I use SQLHelper.cs Thanks, So I can Use SqlHelper .ExecuteDataset SqlHelper .ExecuteNonQuery SqlHelper .ExecuteReader etc. like the way I used in web forms. It wouldn't create any design or other issue as I thought SqlHelper class is designed for web based technologies. Regards, Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 13
    - How to close a socket?? Hello everyone, I am trying to create a Remoting application. The way it works is there is a server and client A, client B, client C. A value is stored on the server which client a-c can access and update. When someone clicks a button on client C for example the value on the server is updated and the server raises an event on all the clients to update ther GUI with the updated values. Thats the basic workings of my application, i also use singleton (marshalbyref) to hold the value on the server and i set the InitializeLifetimeService to null so it lives for ever. The problem that i have is that when Client A connects to the host (server) everything works fine and i can access methods from the remoteobject and raise events. But when i close Client A and then re-open it and click the same button that updates the value on the remoteobject it brings up the following error: An unhandled exception of type 'System.Net.Sockets.SocketException' occurred in mscorlib.dll Additional information: No connection could be made because the target machine actively refused it Now I've done some research into this and think its to do with me not releasing the tcp socket used by the client, on the remote object (server). If so, how do i go about disconnecting correctly when my client application shuts down P.S. I have seen somewhere, when a client connects to the remote object, it 'registers' the clients port number in a hash table and when the client closes, the remote object then uses the a disconnect property. This is quite vague, so ignore if im going down the wrong path :) The application is implemented in .NET v1.1. If you need any more info please ask. Any help appreciated and links to examples would be great. Regards Palvinder Singh Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 14
    - Changing computers default language You'll need a Language Interface Pack . Off topic for the CLR forum. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 15
    - Best practices: File name of a generic type Hi Mattias, There is nothing wrong with just going for the class name as long as I don't have both a generic type and a non-generic type of the class like Microsoft has with EventHandler. System.EventHandler and System.EventHandler<TEventArgs> I could put both classes in the same source file as you mention but I like having a source file for each type. Best regards, Robin Theilade Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 16
    - Validation Select Button Issue Hello, I am using a drop down menu and dynamically populating it with a mysql database. I am trying to validate to make sure that user selects a list of names from the menu. However, I am unsuccessful. I am trying with javascript. Here are section of my code. function SelectCustomer() { if (!document.PendingCustomerInfo.Select.value) { alert("Please select a customer."); return false; } else { return true; } } <select name = "Select" align = "center"> <option value = "0" selected>Select Customer</option> much appreciation on any suggestions. Tag: .NET Base Class Library set the date picker value to null .NET Development
- Next
  - 1
    - how to accelerate network speed hi I am develping an application about networks.Can anybudy send me code in C# that how can I accelerate the networks application. I want code in C#, Can anyone send me code for the same. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 2
    - Serialization of a class deriving from List<T> Hi bruno, Thank you for responding. As matter of fact, it helps knowing that there is some way of doing that, but it isn't exactly what I meant. But it's my fault - The question was too general. Additional info: This restricted list is meant to be a member of other classes marked as Serializable. For my general persistancy layer, I wouldn't want to insert a custom code that handles each and every instance of the RestrictedList in those classes. I am looking for a more generic way of accomplishing serialization that will, for the most, be included as part of the RestrictedList's code, and not be applied from the outside. Maybe even the reference to XmlSerializer is redundant - I am simply looking for a way to make the RestrictedList class to be able serializing and de-serializing itself in complete. Thanks again, Yoav Sion. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 3
    - How to avoid duplicate output using xslt (More help needed) I will try to fit your sample in. I will let you know if it works. (will take some time, am a few days out of the office) Thanks for the reply Perry Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 4
    - Database "design" question What happens when you want to add swahili, urdu, latin etc. Adding new columns later is a pain and requires a code update. I would have table for the movie MovieID OriginalName YearMade Director A table for languages: LanguageID LanguageName A table (one-to-many) matching Movie-to-Language ID MovieFK LanguageFK MovieTitle Thsi would also eliminate the empty fields. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 5
    - Remoting performance problem http://www.megaupload.com/it/ d=281Z6267 inside Implementation.vb there is a loop, remove that to obtain the function return and see the speed change Thanks Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 6
    - .NET framework 2 and .NET framework 3 Is it possible to install both .NET framework 2 and .NET framework 3 on one work station How can I select which version of framework I want to use if I create a new project in Visual Studio 2005 Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 7
    - FindIndex() method Hi Michael, "The problem is that you have no way to associate arbitrary data in order to check your conditions. You'll end up needing to create an instance of a custom class that contains the additional information you need. This custom class would then provide the predicate function to do the comparison work. A little more work but not unreasonable." The OP can use an anonymous method to define the Predicate method. With anonymous methods you can reference local variables and class fields from within the anonymous delegate declaration. In this way they would not have to create a new class. For example: using System; using System.Collections.Generic; namespace Test { class Program { static void Main( string [] args) { Test t = new Test (2); t.Run(); } } class Test { private int number; public Test( int number) { this .number = number; } public void Run() { List < int > numbers = new List < int >(); numbers.Add(0); numbers.Add(1); numbers.Add(2); numbers.Add(3); int index = numbers.FindIndex( delegate ( int currentListItem) { return currentListItem == this .number; }); } } } Thanks Mark. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 8
    - How to make random.... random no that didnt work at all, i'm still getting the same number back for every next i do in the same range. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 9
    - DataReader Close() Issue Yeah it helps, thanks for the tip. What baffles me though is that this behavior seems to be also affecting calls like OdbcDataAdapter Adapter = new OdbcDataAdapter(szSQL,Connection); DataSet ds = new DataSet(); int iResult = Adapter.Fill(ds,0,50,"DEFAULT"); The Fill method, even when used to populate only 50 rows of the dataset suffers from the same delay. I'm thinking that internally to the method , a DataReader is used and Closed without Canceling. How can one possibly use this method (using the Adapter) for displaying data in a DataGrid when the ResultSet is a query against a large table Regard Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 10
    - Web Service Windows Authentication �C Exception on first call Hi, Thanks for the reply. Just to give you a brief idea of what we're doing here and how the Web Service is setup; We have a web service which is running in Windows Authentication mode only. In our Web.Config file we have an Application Setting called 'DealerSecurityGroups' which contains the Windows Security Groups which can access the application. For each security group we have an application setting containing their connection string. For instance in our app config file we have the following: Web.Config AppSettings < appSettings > < add key = " DealerSecurityGroups " value = " DOMAIN\SecurityGroup1,DOMAIN\SecurityGroup2 " /> < add key = " DOMAIN\SecurityGroup1 ConnectionString " value = " Persist Security Info=False;User ID=sa;Initial Catalog=Database1;Data Source=SQLSERVER;Password=password " /> < add key = " DOMAIN\SecurityGroup2 ConnectionString " value = " Persist Security Info=False;User ID=sa;Initial Catalog=Database2;Data Source=SQLSERVER;Password=password " /> < /appSettings > Within the web service we look at which group the user belongs to and decide which database they need to go to. If they don't belong to any group then it throws an Exception, which is correct. This is the code on the Web Service: Web Service Code _ Public Function GetSQLConnectionString() As String 'for providing details on the errors Dim Application As HttpApplicationState = HttpContext.Current.Application Dim Session As Web.SessionState.HttpSessionState = HttpContext.Current.Session Dim sConn As String = Nothing 'if connection string is in application settings then return sConn = CType (Application.Get(NTUserName() & "Connection" ), String ) If sConn Is Nothing Then AppDomain.CurrentDomain.SetPrincipalPolicy(System.Security.Principal.PrincipalPolicy.WindowsPrincipal) Dim Identity As System.Security.Principal.WindowsPrincipal = CType (System.Threading.Thread.CurrentPrincipal, System.Security.Principal.WindowsPrincipal) 'get the security groups that have been set in the web.config file Dim sSecurityGroups As String sSecurityGroups = System.Configuration.ConfigurationManager.AppSettings( "DealerSecurityGroups" ) For Each UserOrGroupName As String In sSecurityGroups.Split(","c) If Identity.IsInRole(UserOrGroupName) OrElse String .Equals(Identity.Identity.Name, UserOrGroupName) Then Application.Add(NTUserName() & "Connection" , DataAccess.GetConnectionString(UserOrGroupName)) Return DataAccess.GetConnectionString(UserOrGroupName) End If Next Else 'we already have a connection to use Return sConn End If 'Throw a specfic exception to indicate that we could not find a connection string for the user. Throw New ApplicationException( "Connection string not found" ) End Function Private Function NTUserName() As String 'Got from web.config file in web service Dim winPrinciple As System.Security.Principal.WindowsPrincipal AppDomain.CurrentDomain.SetPrincipalPolicy(System.Security.Principal.PrincipalPolicy.WindowsPrincipal) ' Get the current principal object winPrinciple = CType (System.Threading.Thread.CurrentPrincipal, System.Security.Principal.WindowsPrincipal) Return winPrinciple.Identity.Name End Function Private F unction GetConnectionString( ByVal UserOrGroupName As String ) As String Dim ConnectionString As String = String .Empty ConnectionString = System.Configuration.ConfigurationManager.AppSettings( String .Concat(UserOrGroupName, " ConnectionString" )) If ConnectionString Is Nothing Then ConnectionString = String .Empty End If Return ConnectionString End Function This is the code on the client side: Code Snippet Private Function GetConnectionString() As String Dim sConnectionString As String Dim theWebService As New WebService.WebService1 Dim cCache As System.Net.CredentialCache cCache = New System.Net.CredentialCache cCache.Add( New Uri(theWebService.Url), "Negotiate" , New System.Net.NetworkCredential( "User1" , "Password1" , "DOMAIN" )) theWebService.Timeout = System.Threading.Timeout.Infinite Return theWebService.GetSQLConnectionString End Function Note that you have to change the username in the CredentialCache to users in different security groups. If the user belongs to SecurityGroup1 or SecurityGroup2 then all is well and it should return the connection string, if it doesn't it should throw an exception. This is the correct scenario. This works in most cases but unfortunately what we're seeing is that if the worker process for the Web Service has been recycled (either 20 minute idle time has occured or Web.Config file modified) and then the first request made to the Web Service doesn't belong to SecurityGroup1 or SecurityGroup2 then the exception is throwen. This is ok but the next bit is weird - the user who made the call seems to stick to the web service. What I mean by this is that if you make a call from a user who belongs to SecurityGroup1 or SecurityGroup2 it no longer works. I've done some more investigation into this and the Web Service thinks the user who made the call was the same user who threw the exception, which is not the case. Strange I know but it's definately the case. Hope this makes sense. Many Thanks in advance Jody Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 11
    - Multiple Application Template Scenarios? Hi Kathy The explanation was sufficient but the answer was not. What I see in the future of acropolis is a composition wizard that would allow me to merger previously completed acropolis projects into one multi-application type product. It works like this; I use acropolis to produce a document centric project, then a separate data centric project. I then use a Composition Template Project to help me combine the two previous projects. A wizard would help me import the views and parts, as well as blend them together with navigation menus, etc. I can see myself composing parts that leverage RSS feed, database access, reporting, graphing and blogging parts. Composing different application types is going to make acropolis sing! Thank you for listening Mike Greenway Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 12
    - How to set javascript flag on Combo box changed event before postback Great!! It's Working... But, now the problem is: when i click the Back button or Close the Window after combobox change, the message is NOT getting asked. Why is this This is my JavaScript: < script language ="JavaScript" type ="text/javascript"> var lock=0; // Cross browser event handling for IE 5+, NS6+ and Gecko function addEvent(elm, evType, fn, useCapture) { if (elm.addEventListener) { // Gecko elm.addEventListener(evType, fn, useCapture); return true ; } else if (elm.attachEvent) { // Internet Explorer var r = elm.attachEvent( 'on' + evType, fn); return r; } else { // Netscape elm[ 'on' + evType] = fn; }} // Add Listeners function addListeners(e) { // Before unload listener addEvent(window, 'beforeunload' , exitAlert, false ); } // Exit Alert function exitAlert(e) { // default warning message if (lock==0){ var msg = "If you leave this page your information will be lost." ; // set event if (!e) { e = window. event ; } if (e) { e.returnValue = msg;} // return warning message return msg;} } addEvent(window, 'load' , addListeners, false ); </ SCRIPT > Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 13
    - Can't uninstall .net framework!!!! Thanks manishak for the removal tool but it did not help me. I tried to run the program but as soon as I tried to remove .netframework my computer froze again. As I said earlier when I ran my antivirus program or check disk my computer froze at .netframework v2.0. I have it narrowed down to the eula .txt files. Even when I pass my pointer over the files to see the properties of the files my computer freezes! Would it help to run the romoval tool in "safe mode" Bob Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 14
    - Creating Index with oledb for FoxPro Hello, well I'm trying to create an index over a field of a dbf file with a VB 2005 program, I'm using an oledb connexion. The code is like this public sub test() dim objcnx as oledbconnection dim objcmd as olddbcommand objcnx=new oledbconnection() objcmd = new oledbcommand() objcnx.connectionstring="Provider=vfpoledb.1;Data Source=c:\test.dbf;collating Sequence= machine" objcmd.commandtext="create index tester on test (field1) " objcnx.open() objcmnd.executenonquery() <<<---- I get "Syntax Error" here with the OleDbException objcnx.close() end sub Does anybody have an idea why I'm getting this error , tnx for your help Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 15
    - Killer Error : Exception from HRESULT: 0x800700C1 Hi, I don't know why I will solve this problem, but it's killing me, and my boss too.. The error is : is not a valid Win32 application. (Exception from HRESULT: 0x800700C1) and .... BadImageFormatException and bla bla bla.. But I don't see in any place the name of the assembly that cause de error or even the especific place where go to solve it. can somebody help me Thax a lot.. Jose Manuel. Tag: .NET Base Class Library set the date picker value to null .NET Development
  - 16
    - Compilation Error??? Not Enough Disk Space not sure. i don't have access to the server so i will have to check with the IT guys. Tag: .NET Base Class Library set the date picker value to null .NET Development

Jassim Rahma

is there any way to set the date picker on the windows form to null so it forces the user to set the date instead of setting it by default to current date

Re: .NET Base Class Library set the date picker value to null

Oleh Svintsitskyy

Hi Jassim,

You can use Validating event to validate user's input in conjunction with ErrorProvider component.

Regards,

Oleh.

Re: .NET Base Class Library set the date picker value to null

Jassim Rahma

what about setting the date initialy to nothing, just blank date, blank month and blank year

Re: .NET Base Class Library set the date picker value to null

Oleh Svintsitskyy

Hi Jassim,

You can't set it to null or specify blank date,month or year.Provided date must be more than DateTime.MinValue and less than DateTime.MaxValue otherwise exception will be raised.

If year, month or date will be set as blank(0) - exception will be raised also.

As for me optimal decision is to validate user input using validating event.

Regards,

Oleh.

Re: .NET Base Class Library set the date picker value to null

Jassim Rahma

but how can i validate if it's patient's age !

when the clerk has too many patiens waiting she will just ignore this field because it's already set to default which is current date which is valid for today's borned patient.

Re: .NET Base Class Library set the date picker value to null

Oleh Svintsitskyy

Hi Jassim,

In such case patience born date could not be validated.But You can use DateTimePicker container's validating event to get clerk's attention and check whether he had not forgot to set correct patience born date.

Code Block

bool bClose = false;

private void datetimepickercontainer_Validating(object sender, System.ComponentModel.CancelEventArgs e)

{

if(!bClose)

{

string strWarning = "Ensure patience's born date is correct!";

errorProvider1.SetError(dateTimePicker1, strWarning);

MessageBox.Show(strWarning,"Warning",MessageBoxButtons.OK,MessageBoxIcon.Warning);

e.Cancel = true;

bClose = true;

}

}

Regards,

Oleh.