Dot Net Code Snippets

Here is the code to set focus on some control , while we use the Master page

ScriptManager.RegisterStartupScript(Me, Me.GetType(), "Focus", String.Format("window.setTimeout('$get(""{0}"").focus()', 300);", ControlToFocus.ClientID), True)

or Refer this article

http://www.dotnetcurry.com/ShowArticle.aspx?ID=275

Showing messagebox like yes , no in vb.net and proceed if yes else exit ..

       Dim button As DialogResult

      button = MessageBox.Show _
      ("Are you sure you want to exit this application?", _
      "Message", MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1)

      If button = Windows.Forms.DialogResult.Yes Then
          Me.Close()
      Else
          'Do Nothing
      End If

Here the number of way to show the date ie: extract from the SQL query

select convert(varchar,getdate(),101)
OutPut:- 06/18/2008

select convert(varchar,getdate(),102)
OutPut:- 2008.06.18

select convert(varchar,getdate(),103)
OutPut:- 18/06/2008

select convert(varchar,getdate(),104)
OutPut:- 18.06.2008

select convert(varchar,getdate(),105)
OutPut:- 18-06-2008

select convert(varchar,getdate(),106)
OutPut:- 18 Jun 2008

select convert(varchar,getdate(),107)
OutPut:- Jun 18, 2008

select convert(varchar,getdate(),108)
OutPut:- 10:53:20

select convert(varchar,getdate(),109)
OutPut:- Jun 18 2008 10:53:30:507AM

select convert(varchar,getdate(),110)
OutPut:- 06-18-2008

select convert(varchar,getdate(),111)
OutPut:- 2008/06/18

select convert(varchar,getdate(),112)
OutPut:- 20080618

select convert(varchar,getdate(),113)
OutPut:- 18 Jun 2008 10:54:01:253

select convert(varchar,getdate(),114)
OutPut:- 10:54:08:473

select convert(varchar,getdate(),120))
OutPut:- 2008-06-18 10:54:15 

Hi, if you got error like this..Could not load file or Assembly for While you adding AjaxToolkit.dll

You have update your ajaxtoolkit from Codeplex.com

Here the link

http://www.codeplex.com/AjaxControlToolkit/Release/ProjectReleases.aspx?ReleaseId=8513

To upload large files in asp.net you have to increase the MaxrequestLength and Executiontimeout of the httpruntime settings of your web.config file.By Default it will upload 4MB

suppose if i want to upload upto 8 MB you have to include this tag in you web.config file , don't change anything in your machine.config files.

httpruntime  maxRequestLength="1048576" executionTimeout="450"

 

To validate the fileupload control use Custom Validator and call this function on ClientValidateFunction property of Custom validator.

You can pass the file extension , Watever you want to allow..

function ValidateSFrontImageUpload(Source, args)
{
var fuData = document.getElementById('<%= FrontSImage_FileUpload.ClientID %>');
var FileUploadPath = fuData.value;

if(FileUploadPath =='')
{
// There is no file selected
args.IsValid = false;
}
else
{
var Extension = FileUploadPath.substring(FileUploadPath.lastIndexOf('.') + 1).toLowerCase();

if (Extension == "jpg" || Extension == "jpeg" || Extension == "png" || Extension == "gif")
{
args.IsValid = true; // Valid file type
}
else
{
args.IsValid = false; // Not valid file type
}
}
}

If you are not using master pages then you have to paste this code of all the pages (on load event).


Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1));
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetNoStore();

On logout

You have to write

Session.Abandon();
Session.Clear();

Here the Html Code , html was not allowed here so i have conver < - &lt and > - &gt


&lt asp:HyperLink ID="HyperLink1" Visible=" &lt %# isFilePathEmpty(Eval("filepath")) % &gt " NavigateUrl="~/AddPost.aspx?ForumID=18#" runat="server" &gt
&lt %# Eval("PartNumber") &gt
&lt /asp:HyperLink &gt

then create a method called isFilePathEmpty(string filePath) in the code behind which returns a boolean.

If you are getting this error .

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster

Write the below code..

Update your web.config with following attributes.

pages validateRequest="false" enableEventValidation="false" viewStateEncryptionMode ="Never" enableViewStateMac="false"