c# - deleting selected row from the gridview using dropdown list -


i using gridview , in gridview im using dropdown list. 

<div class="container" style="padding-right: 15px; padding-left: 15px; margin-top:auto">     <br /><br /><br />     <asp:gridview id="grduser" runat="server" allowpaging="true" allowsorting="true" captionalign="left" onpageindexchanging="grduser_pageindexchanging" onsorting="grduser_sorting" pagesize="5" cssclass="table table-hover table-striped table-responsive">         <alternatingrowstyle backcolor="#9999ff" />         <headerstyle backcolor="#009933" font-bold="true" font-size="medium" horizontalalign="center" verticalalign="middle" />         <pagersettings firstpagetext="first" mode="numericfirstlast" lastpagetext="last" pagebuttoncount="4" nextpagetext="" />         <pagerstyle backcolor="#ffff66" horizontalalign="right" verticalalign="middle" forecolor="black" />         <columns>             <asp:templatefield>                 <itemtemplate>                     <asp:dropdownlist id="ddlact" runat="server" onselectedindexchanged="ddlact_selectedindexchanged">                         <asp:listitem value="action">action</asp:listitem>                         <asp:listitem value="activate">activate</asp:listitem>                         <asp:listitem value="block">block</asp:listitem>                         <asp:listitem value="delete">delete</asp:listitem>                     </asp:dropdownlist>                 </itemtemplate>             </asp:templatefield>         </columns>     </asp:gridview>  </div>

ok want hide selected row grid when on specific row.

code :

 public void getdatatable() {      string cs = configurationmanager.connectionstrings["facebookconnectionstring1"].connectionstring;     using (sqlconnection con = new sqlconnection(cs))     {         using (sqlcommand cmd = new sqlcommand())         {              cmd.connection = con;             cmd.commandtext = "select f_name [first name], s_name [surname], e_mail [email], day+'-'+month+'-'+year [birthday], gender [gender] users order f_name";             cmd.commandtype = commandtype.text;             if (con.state == connectionstate.closed)                 con.open();             sqldatareader dr = cmd.executereader(commandbehavior.closeconnection);             dt.clear();             dt.load(dr);              grduser.datasource = dt;             grduser.databind();             cmd.dispose();             con.close();         }      } }

for dropdown selected index change have ? please me .

protected void ddlact_selectedindexchanged(object sender, eventargs e) {  // i'll doing here ?    }


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