How to Find and Use Controls within a GridView's TemplateField?

How to Find Control in TemplateField of GridView?

Finding a control within a GridView's TemplateField can be achieved using the FindControl() method.

Scenario

In this example, we have a GridView with a TemplateField that contains a HyperLink. The task is to access and manipulate the HyperLink using code-behind.

Solution

The following code demonstrates how to access the HyperLink control in the RowDataBound event of the GridView:

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        HyperLink myHyperLink = e.Row.FindControl("myHyperLinkID") as HyperLink;
    }
}

Detailed Explanation

1. GridView1_RowDataBound: This is the event handler for the RowDataBound event of the GridView. It is triggered for each data row in the GridView.
2. FindControl: This method is used to find the HyperLink control within the TemplateField. The syntax is e.Row.FindControl(controlID) where controlID is the ID of the control you want to find.
3. As HyperLink: The FindControl method returns an object of type Control. You can then cast it to the specific type of control you want to access, which in this case is HyperLink.

Usage

Once you have a reference to the HyperLink control, you can set its properties, handle events, or perform other operations as needed. For instance, you can set the NavigateUrl property to specify the URL to navigate to when the link is clicked.

HyperLink myHyperLink = e.Row.FindControl("myHyperLinkID") as HyperLink;
myHyperLink.NavigateUrl = "http://www.example.com";

Remarks

It's important to note that the FindControl() method only searches within the scope of the current data row. If the control is located in a nested TemplateField, you may need to use the FindControlRecursive() method.

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