c# - Integer only validation for dynamically added Textbox inside Asp.net Gridview -

below how gridview code , since datatable pivoted value number of columns cannot predicted. adding textbox dynamically through code.

<asp:gridview id="gvdata"                 emptydatatext="there no data records display."                 runat="server" autogeneratecolumns="false"                 headerstyle-backcolor="#3ac0f2"                   headerstyle-forecolor="white" onrowdatabound="gvdata_rowdatabound"  >                 <rowstyle bordercolor="lightblue" /> </asp:gridview>   protected void page_load(object sender, eventargs e)     {      foreach (var item in columnnames)                 {                      templatefield tfield = new templatefield();                     tfield.headertext = item;                     gvdata.columns.add(tfield);                 }                  gvdata.datasource = ds.tables[0];                 gvdata.databind();}  protected void gvdata_rowdatabound(object sender, gridviewroweventargs e)     {         if (e.row.rowtype == datacontrolrowtype.datarow)         {             (int = 3; < columnnames.length; i++)             {                 textboxcount++;                 textbox txtname = new textbox();                 txtname.id = "txt" + convert.tostring(textboxcount);                 txtname.borderstyle = borderstyle.none;                 txtname.text = (e.row.dataitem datarowview).row[columnnames[i]].tostring();                 e.row.cells[i].controls.add(txtname); }}} 

now when user try change value in textbox have validate enter integer value. here not sure has done.

you can use int.tyrparse method

example

int number; string s = "aa"; bool isinteger = int.tryparse(s, out number);