c# - How to keep the checkbox inside gridview checked based on certain condition? -

i have gridview on web , checkbox inside template field. having field in database holds integer value 0 or 1. 0 enable , 1 disable. when check checkbox inserts 1 particular field in database , vice-versa. want when open page, rows value 1 in table should remain checked , rows value 0 in table should remain unchecked.i have tried doing this- aspx page-

<asp:gridview id="gridmain" runat="server" width="1000px"          autogeneratecolumns="false" onrowdatabound="gridmain_rowdatabound">         <columns>             <asp:templatefield headertext="student name">                 <itemtemplate>                     <asp:label id="lblname" runat="server" text='<%# eval("name") %>'></asp:label>                 </itemtemplate>             </asp:templatefield>             <asp:templatefield headertext="enable/disable">                 <itemtemplate>                     <asp:checkbox id="chkenbl" runat="server" autopostback="true"                          oncheckedchanged="chkenbl_checkedchanged"                          checked='<%# convert.toboolean(eval("en_dis")) %>' />                     <br />                     <asp:label id="label1" runat="server" text='<%# eval("id") %>'></asp:label>                     &nbsp;<asp:label id="label2" runat="server" text='<%# eval("en_dis") %>'                          visible="false"></asp:label>                 </itemtemplate>             </asp:templatefield>         </columns>     </asp:gridview> 

this cs page-

    protected void page_load(object sender, eventargs e)     {         if (!ispostback)         {             show();          }         //chkbind();     }     public void show()     {         try         {             dt = g1.return_dt("select id,name,en_dis tbl_data_show order name");             if (dt.rows.count > 0)             {                 adsource = new pageddatasource();                 adsource.datasource = dt.defaultview;                 adsource.pagesize = 5;                 gridmain.datasource = adsource;                 gridmain.databind();             }         }         catch (exception ex)         {             response.write(ex.tostring());         }     } protected void chkenbl_checkedchanged(object sender, eventargs e)     {             checkbox chk = (checkbox)sender;             //checkbox chk = sender checkbox;             //checkbox chk = (checkbox)row.findcontrol("chkenbl");             gridviewrow row = (gridviewrow)chk.namingcontainer;             if (chk.checked)             {                 try                 {                     //label lblid = (label)gridmain.findcontrol("label1");                     //label lblid = new label();                     //lblid.text = gridmain.findcontrol("label1").tostring();                     string lblid = ((label)row.findcontrol("label1")).text;                     rows = g1.execdb("update tbl_data_show set en_dis='1' id=" + lblid);                     if (rows > 0)                     {                         response.write("rows effected successfull.");                     }                 }                 catch (exception ex)                 {                     response.write(ex.tostring());                 }             }             else             {                 //label lblid1 = (label)gridmain.findcontrol("label1");                 //label lblid1 = new label();                 //lblid1.text = gridmain.findcontrol("label1").tostring();                 string lblid1 = ((label)row.findcontrol("label1")).text;                 rows = g1.execdb("update tbl_data_show set en_dis='0' id=" + lblid1);                 if (rows > 0)                 {                     response.write("rows effected successfull.");                 }             }     } protected void gridmain_rowdatabound(object sender, gridviewroweventargs e)     {         if (e.row.rowtype == datacontrolrowtype.datarow)         {             dt = g1.return_dt("select en_dis tbl_data_show");             if (dt.rows.count > 0)             {                // checkbox chk1 = new checkbox();                 checkbox chk1 = (checkbox)e.row.findcontrol("chkenbl");                 //checkbox                 if (dt.rows[0]["en_dis"] == "0")                 {                      chk1.checked = false;                 }                 else                 {                     chk1.checked = true;                 }             }         }     } 

please guide me doing wrong?

in markup can add checked='<%# convert.toboolean(eval("en_dis")) %>'. see example below:

<asp:checkbox id="chkenbl" runat="server" autopostback="true" checked='<%# convert.toboolean(eval("en_dis")) %>' oncheckedchanged="chkenbl_checkedchanged" /> 

or

1. use onrowdatabound event of gridview.
2. make asp hidden field keep value of en_dis column of datatable using same eval function.
3. find checkbox control , make checked or unchecked based on value retrieved hidden field control.