.net - template field issue in the gridview -

q:

i have following problem , , don't know how fix really.

i have grid view 1 of columns template field (text box). grid view consists of 8 rows . every time user enter data in text box,i put total in last text box(which set enabled = false).i sum data entry in text boxes through method , call in event text changed . every time enter number in text box , click tab in keyboard or use mouse cursor move next box lose focus , , have put mouse cursor again in intended textbox.

i try following methods fix problem in vain .

 foreach (gridviewrow r in gv_evaluation.rows)             {                 ((radtextbox)r.cells[3].findcontrol("txt_evaluateweights")).attributes.add("blur", "calc()");             } 

in page load , doesn't work @ all.

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protected void txt_evaluateweights_textchanged(object sender, eventargs e) {     calc();     ((textbox)sender).focus(); } 

this way return focus previous textbox (i mean 1 have done) not text box wanna focus in, enter data.

edit:

my calc method:

private void calc()         {             float sum = 0;             (int = 0; < 7; i++)             {                 radtextbox txt1 = (radtextbox)gv_evaluation.rows[i].cells[3].findcontrol("txt_evaluateweights");                 int weight;                 bool result = int32.tryparse(txt1.text, out weight);                 if (result)                 {                     sum += weight;                 }             }              double percentage;             percentage = math.round((sum / 100) * 100, 2);             radtextbox txt3 = (radtextbox)gv_evaluation.rows[7].cells[3].findcontrol("txt_evaluateweights");             txt3.text = percentage.tostring();//string.format("{0:0.0%}", percentage.tostring());          } 

doing using server side postback horrendous way of doing this.

use javascript instead. here small example in jquery

the gridview

<asp:gridview id="demogrid" runat="server"             autogeneratecolumns="false"             showfooter="true">     <columns>         <asp:templatefield headertext="index">             <itemtemplate><%# container.dataitemindex + 1 %></itemtemplate>         </asp:templatefield>         <asp:templatefield headertext="item">             <itemtemplate>                 <asp:label id="demolabel" runat="server" text='<%# container.dataitem %>' />             </itemtemplate>             <footertemplate>total</footertemplate>         </asp:templatefield>         <asp:templatefield headertext="amount">             <itemtemplate>                 <asp:textbox id="demotext" runat="server" cssclass="quantity">                 </asp:textbox>             </itemtemplate>             <footertemplate>                 <asp:label id="totallabel" runat="server" cssclass="result"/>             </footertemplate>         </asp:templatefield>     </columns> </asp:gridview> 

the code behind

protected void page_load(object sender, eventargs e){     if (!ispostback)     {         string[] array = new string[] { "demo1", "demo2", "demo3", "demo4", "demo5" };         demogrid.datasource = array;         demogrid.databind();     } } 

the javascript (jquery)

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js" type="text/javascript"></script> <script type="text/javascript">     $(document).ready(function () {         $(".quantity").bind("blur", function () {             var $quantity = $(this);             var quantity = +$quantity.val(); //cast number             if (!isnan(quantity)) {                 var $sum = $quantity.closest("table").find("tr:last .result");                 var sum = +$sum.html();                 $sum.html(sum + quantity);             }         });     }); </script> 

hope helps