グリッドにレコードがない場合は、database.howをチェックせずに「レコードが見つかりません」と表示する必要がありますか？

Question

protected void btnedit_Click1(object sender, EventArgs e) 
    { 

     dt = (DataTable)ViewState["qualification"]; 
     int Id; 
     foreach (GridViewRow row in gvqualification.Rows) 
     { 
      RadioButton rb = (RadioButton)row.FindControl("rdoselect"); 
      HiddenField HFI = (HiddenField)row.FindControl("autoid"); 
      HiddenField HFE = (HiddenField)row.FindControl("qualificationid"); 
      Label lbleducational = (Label)row.FindControl("lbgeducationallevel"); 
      Label lblcollege = (Label)row.FindControl("lbgcollege"); 
      Label lbluniversity = (Label)row.FindControl("lbguniversity"); 
      Label lblspecialization = (Label)row.FindControl("lbgspecialization"); 
      Label lblscore = (Label)row.FindControl("lbgscore"); 
      Label lblstartyear = (Label)row.FindControl("lbgstartyear"); 
      Label lblyearofcompletion = (Label)row.FindControl("lbgyearofcompletion"); 
      Label lblstate = (Label)row.FindControl("lbgstate"); 
      Label lblcountry = (Label)row.FindControl("lbgcountry"); 


      if (rb.Checked) 
      { 
       Id = int.Parse(HFI.Value); 
       hqualificationid.Value = HFE.Value; 
       txteducationallevel.Text = lbleducational.Text; 
       txtcollegename.Text = lblcollege.Text; 
       txtuniversity.Text = lbluniversity.Text; 
       txtspecialization.Text = lblspecialization.Text; 
       txtscore.Text = lblscore.Text; 
       ddlstartyear.Text = lblstartyear.Text; 
       ddlyearofcompletion.Text = lblyearofcompletion.Text; 
       txtstate.Text = lblstate.Text; 
       txtcountry.Text = lblcountry.Text; 
       dt = (DataTable)ViewState["qualification"]; 
       int index = -1; 
       try 
       { 
        foreach (DataRow dr in dt.Rows) 
        { 
         index = index + 1; 
         if (dr["ID"].ToString() == Id.ToString()) 
         { 
          dt.Rows[index].Delete(); 
          ViewState["qualification"] = dt; 
          btnremove.Visible = false; 
         } 
        } 
       } 
       catch (Exception E) 
       { 
        dt = (DataTable)ViewState["qualification"]; 
        gvqualification.DataSource = dt; 
        gvqualification.DataBind(); 
       } 
      } 


     } 
    } 

Answer 1

GridViewには "EmptyDataText"プロパティがあり、データがない場合はテキストが設定されます。

<asp:GridView ID="grid" runat="server" EmptyDataText="No Record Found!" > 
<column> --- </column> 
</asp:GridView>