asp.net - Enable/disable button template of gridview -

how enable delete button if user have modify data in gridview

<edititemtemplate>   <div class='actions'>   <asp:button id="btnupdate" runat="server" text=" update " tooltip="update row" commandname="update" />&nbsp;&nbsp;&nbsp;&nbsp;   <asp:button id="btncancel" runat="server" text=" cancel " tooltip="cancel row" causesvalidation="false"  commandname="cancel" />   </div> </edititemtemplate> 

please use code. in source file

 <asp:commandfield showeditbutton="true" showcancelbutton="true" headertext="edit / delete" itemstyle-width="8%"                                         showdeletebutton="true" itemstyle-horizontalalign="left" headerstyle-horizontalalign="left" /> 

in cs file

 protected void gvstatmeasures_rowediting(object sender, gridviewediteventargs e)     {         try         {             gvstatmeasures.editindex = e.neweditindex;             // bind grid view         }         catch (exception ex)         {             fnmessage(true, ex.message);         }     }  protected void gvstatmeasures_rowcancelingedit(object sender, gridviewcancelediteventargs e) {     try     {         gvstatmeasures.editindex = -1;         // bind grid view     }     catch (exception ex)     {         fnmessage(true, ex.message);     } }      protected void gvstatmeasures_rowdeleting(object sender, gridviewdeleteeventargs e)     {         try         {               int istatictypeid = int32.parse(gvstatmeasures.datakeys[e.rowindex].value.tostring());  // datakey value of gridview pk or else need identify records.              // delete code             //bind grid         }         catch (exception ex)         {             fnmessage(true, ex.message);         }     }