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From: Mario on 18 Apr 2010 08:27 I need to pick up the "TotalItemsLabel" text in my C# method. How to do that if this is the part of my Default.aspx page which is generated from master page: ... <asp:ListView ID="ListView1" runat="server" DataKeyNames="ID" DataSourceID="ObjectDataSourceNarudzba" ... <LayoutTemplate> <table id="Table2" runat="server"> <tr id="Tr1" runat="server"> <td id="Td1" runat="server"> <table id="itemPlaceholderContainer" runat="server" border="1" style="background-color: #FFFFFF; border-collapse: collapse; border-color: #999999; border-style: none; border-width: 1px; font-family: Verdana, Arial, Helvetica, sans-serif;"> <tr id="Tr2" runat="server" style="background-color: #FFFBD6; color: #333333;"> <th id="Th1" runat="server"> </th> <th id="Th2" runat="server"> </th> <th id="Th3" runat="server"> TEKST </th> <th id="Th4" runat="server"> OPIS </th> </tr> <tr id="itemPlaceholder" runat="server"> </tr> </table> </td> </tr> <tr id="Tr3" runat="server"> <td id="Td2" runat="server" style="text-align: center; background-color: #FFCC66; font-family: Verdana, Arial, Helvetica, sans-serif; color: #333333;"> <asp:DataPager ID="DataPager1" runat="server" PageSize="4"> <Fields> <asp:NextPreviousPagerField ButtonType="Button" ShowFirstPageButton="True" ShowLastPageButton="True" /> <asp:TemplatePagerField> <PagerTemplate> <b>stranica: <asp:Label runat="server" ID="CurrentPageLabel" Text="<%# Container.StartRowIndex %>" /> od <asp:Label runat="server" ID="TotalPagesLabel" Text="<%# Container.StartRowIndex+Container.PageSize %>" /> (ukupno <asp:Label runat="server" ID="TotalItemsLabel" Text="<%# Container.TotalRowCount%>" /> zapisa) <br /> </b> </PagerTemplate> </asp:TemplatePagerField> </Fields> </asp:DataPager> </td> </tr> </table> </LayoutTemplate> ... </asp:ListView> I tried like this: Label x = (Label)ListView1.InsertItem.FindControl("DataPager1").FindControl("TotalItemsLabel"); but I got: Object reference not set to an instance of an object I also tried: DataPager y= (DataPager)ListView1.InsertItem.FindControl("DataPager1"); Got the same error. Finaly I tried to Find all IDs from ListView to DataPager: DataPager stranicnik = (DataPager)ListView1.InsertItem.FindControl("Table2").FindControl("Tr3").FindControl("Td2").FindControl("DataPager1"); //count = stranicnik.TotalRowCount; //pageSize = stranicnik.PageSize; And again got the same error. How to find DataPager control to get the TotalRowCount, which is works perfectly on my aspx page? Or how to Find that specific label ? All that I tried within C# method ListView1_DataBound
From: Mario on 18 Apr 2010 09:01 On 18.04.2010. 14:27, Mario wrote: > Object reference not set to an instance of an object I frankly don't know how I will solve that and many other similar problems with Master page and Find inherits controls, without this: http://www.west-wind.com/Weblog/posts/5127.aspx great blog. So much artificial help in writing code, and you can't find some control! The same thing is with Text Binding or Eval in some aspx control. You just need to know. It is to frustrating for begineers like me.
From: Mr. Arnold on 18 Apr 2010 10:08 Mario wrote: > > I need to pick up the "TotalItemsLabel" text in my C# method. How to do > that if this is the part of my Default.aspx page which is generated from > master page: You would do in the ItemDataBound event for the control in the codebehind file. It's only going to work for the one item that is bounded. You can do a Control.Find() and find TotalItemsLabel. var lbl = Control.Find("TotalItemsLabel") If(lbl != null) { var someval = lbl.Text; } > ... > <asp:ListView ID="ListView1" runat="server" DataKeyNames="ID" > DataSourceID="ObjectDataSourceNarudzba" > ... > <LayoutTemplate> > <table id="Table2" runat="server"> > <tr id="Tr1" runat="server"> > <td id="Td1" runat="server"> > <table id="itemPlaceholderContainer" > runat="server" border="1" style="background-color: #FFFFFF; > border-collapse: collapse; > border-color: #999999; border-style: none; border-width: 1px; > font-family: Verdana, Arial, > Helvetica, sans-serif;"> > <tr id="Tr2" runat="server" > style="background-color: #FFFBD6; color: #333333;"> > <th id="Th1" runat="server"> > </th> > <th id="Th2" runat="server"> > </th> > <th id="Th3" runat="server"> > TEKST > </th> > <th id="Th4" runat="server"> > OPIS > </th> > </tr> > <tr id="itemPlaceholder" > runat="server"> > </tr> > </table> > </td> > </tr> > <tr id="Tr3" runat="server"> > <td id="Td2" runat="server" > style="text-align: center; background-color: #FFCC66; > font-family: Verdana, Arial, Helvetica, > sans-serif; color: #333333;"> > <asp:DataPager ID="DataPager1" > runat="server" PageSize="4"> > <Fields> > <asp:NextPreviousPagerField > ButtonType="Button" ShowFirstPageButton="True" ShowLastPageButton="True" /> > <asp:TemplatePagerField> > <PagerTemplate> > <b>stranica: > <asp:Label > runat="server" ID="CurrentPageLabel" Text="<%# Container.StartRowIndex > %>" /> > od > <asp:Label > runat="server" ID="TotalPagesLabel" Text="<%# > Container.StartRowIndex+Container.PageSize %>" /> > (ukupno > <asp:Label > runat="server" ID="TotalItemsLabel" Text="<%# Container.TotalRowCount%>" /> > zapisa) > <br /> > </b> > </PagerTemplate> > </asp:TemplatePagerField> > </Fields> > </asp:DataPager> > </td> > </tr> > </table> > </LayoutTemplate> > ... > </asp:ListView> > > > > I tried like this: > Label x = > (Label)ListView1.InsertItem.FindControl("DataPager1").FindControl("TotalItemsLabel"); > > > but I got: Object reference not set to an instance of an object It didn't find the control. If an object is null because it didn't find something to set the object, then you'll the get message above. > > I also tried: > DataPager y= > (DataPager)ListView1.InsertItem.FindControl("DataPager1"); > Got the same error. > Finaly I tried to Find all IDs from ListView to DataPager: > DataPager stranicnik = > (DataPager)ListView1.InsertItem.FindControl("Table2").FindControl("Tr3").FindControl("Td2").FindControl("DataPager1"); > > //count = stranicnik.TotalRowCount; > //pageSize = stranicnik.PageSize; > And again got the same error. > How to find DataPager control to get the TotalRowCount, which is works > perfectly on my aspx page? Or how to Find that specific label ? > All that I tried within C# method ListView1_DataBound I think you may need to use a javascript function using getelementbyid, which would be fired off some control client side event. You would use an ASP:HiddenField and the function would populate the HiddenField, and you gat the value from the HiddenField on a server side event in codebehind file. http://www.tizag.com/javascriptT/javascript-getelementbyid.php
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