How to Update/Set the textbox value after Grid Updating.

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.NET

Dear,

I wrote below code when grid update then fire that code and set the value in TextBox/Label.

I debug the below code and see the Value is getting but not showing in TextBox/Label.

When it showing when the complete page getting refreshed.

I called in Page_Load also.

Private Sub frm_getObjectivescore()
    con.Open()
    cmd = New SqlClient.SqlCommand("select sum(Value) as T_Count from View_EmployeeApraisalDetails2 Where Apr_No=" & Request("Apr_No") & "", con)
    dr = cmd.ExecuteReader()
    If dr.HasRows Then
        While dr.Read
            TextBox1.Text = Math.Round(dr("T_Count") * 0.4, 2)
        End While
    End If
    con.Close()
End Sub