asp.net - GridView DataBind() not working on Submit button -


i have grid view on page, on clicking submit button, row added database table grid view not update itself, when navigate page, , come again, grid view shows newly added record.

i cant figure out why happening, check number of rows in grid using debug mode, grid's rows.count shows 1 row, grid cant display it

and not doing thing gridview's data source in code behind, binded sqldatasource in design view.

code behind submit button:

protected void btnsubmit_click(object sender, eventargs e)         {                 eauctionentities ea = new eauctionentities();                 bid b = new bid();                  b.bidderemail = session["useremail"].tostring();                 b.biddername = session["username"].tostring();                 b.bidend = convert.todatetime(txtendson.text);                 b.bidplacedon = datetime.now.date;                 b.bidprice = convert.todecimal(txtyourbid.text.trim());                 b.isavailable = true;                 b.prod = convert.toint32(request.querystring["id"]);                 b.bidminprice = convert.todecimal(txtbidstart.text.trim());                 b.iswon = false;                  ea.bids.addobject(b);                 if (ea.savechanges() == 1)                 {                     lblbid.text = "bid added !";                     gvcurrentbids.databind();                 }                 ea.dispose();             }

aspx code gridview , datasource:

<asp:gridview id="gvcurrentbids" runat="server"                      backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px"                      cellpadding="3" datasourceid="dstotalbids" width="100%">                     <columns>                         <asp:boundfield datafield="biddername" headertext="biddername"                              sortexpression="biddername" />                         <asp:boundfield datafield="bidprice" headertext="bidprice"                              sortexpression="bidprice" />                         <asp:boundfield datafield="bidend" headertext="bidend"                              sortexpression="bidend" />                     </columns>                     <footerstyle backcolor="white" forecolor="#000066" />                     <headerstyle backcolor="#006699" cssclass="headerfreez" font-bold="true"                          forecolor="white" />                     <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left" />                     <rowstyle forecolor="#000066" />                     <selectedrowstyle backcolor="peachpuff" />                     <sortedascendingcellstyle backcolor="#f1f1f1" />                     <sortedascendingheaderstyle backcolor="#007dbb" />                     <sorteddescendingcellstyle backcolor="#cac9c9" />                     <sorteddescendingheaderstyle backcolor="#00547e" />                 </asp:gridview>                 <asp:sqldatasource id="dstotalbids" runat="server"                      connectionstring="<%$ connectionstrings:eauctionconnectionstring %>"                      selectcommand="select [biddername], [bidprice], [bidend] [bid] (([isavailable] = @isavailable) , ([prod] = @prod))">                     <selectparameters>                         <asp:parameter defaultvalue="true" name="isavailable" type="boolean" />                         <asp:querystringparameter name="prod" querystringfield="id" type="int32" />                     </selectparameters>                 </asp:sqldatasource>

i have tried calling grid's databind method inside page load, cant update after submit button click


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