I want to change textbox to label programatically in gridview in edit mode in asp.net

Generally in gridview template columns there are two templates, first one is Item Template and second one is EditItem template.

Generally what we do is to to keep lable in Item template and textboxes in EditItem template of every column (or some other control like dropdown or checkbox based on requirement).

In your case for all those columns which you don't want to be updated, keep label in both item as well as in EditItem template.

One more thing if your columns are not template column convert them.


Hope this will help.

Refer the below code for grid editing , deleteing

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        int ID = (int)GridView1.DataKeys[e.RowIndex].Value;
        // Query the database and get the values based on the ID and delete it.
        lblMsg.Text = "Deleted Record Id" +ID.ToString();
      
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        BindGrid();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
       
        // Retrieve the row being edited.
        int index = GridView1.EditIndex;
        GridViewRow row = GridView1.Rows[index];
        TextBox t1 = row.FindControl("TextBox1") as TextBox;
        TextBox t2 = row.FindControl("TextBox2") as TextBox;
        string t3 = GridView1.DataKeys[e.RowIndex].Value.ToString();

        lblMsg.Text = "Updated record " + t1.Text + "," + t2.Text + "Value From Bound Field" + t3;
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        BindGrid();
    }

Follow these links it may help you

http://aspsnippets.com/Articles/Simple-Insert-Select-Edit-Update-and-Delete-in-ASPNet-GridView-control.aspx[^]
http://ramanisandeep.net/2008/11/16/gridview-insert-update-delete/[^]