Sometimes we need to use galleries in our sites such as light box or any JQuery photo gallery , But the gallery needs two separate image files . One is big and the other is small or thumbnail. We don't need to bother the user for uploading 2 files with different sizes (width and height). consider...

The CustomValidator control allows you to create a validation control with customized validation logic. For example, you can create a validation control that checks whether the checkbox is checked or not . To validate the checkbox with The CustomValidator control Use the ClientValidationFunction property...

The following example demonstrates how to use the DataKeyNames property to specify the key field of the data source. In the example, the DataKeyNames attribute of the GridView element in markup specifies two key fields by using a comma to separate the names. aspx page<asp:GridView ID="GridView1"...

Sometimes you need to redirect the user to another page after he clicks on 'OK' button in the javascript alert box. Just type your complete script and assign it to a string variable. register it with RegisterStartupScript as follows. Look at this example : C# code behind:string strScript = "<script>"; strScript...

To increase this size limit you have to make some changes in either the web.config file for the application or in the machine.config file of the machine if you want to apply to all applications that are on the server. Add this line under the <system.web> tag <system.web>   <httpRuntime ...