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How to fire click event using a button in nestedviewtemplate inside a grid

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Grid

This is a migrated thread and some comments may be shown as answers.

Abdul asked on 06 Jun 2013, 09:56 PM

I am evaluating Telerik component for a project and I am running into some issue that I hope someone could assist me with.

I have a button inside a nestedviewtemplate which is embedded inside a grid control. I have populated the grid with my data using the OnNeedDataSource property, I was also able to get detailed records on the ListView, however, I needed to perform an update to some tables when a button inside the nestedviewtemplate is clicked.

I could not find the button inside the click event. Also, I do not know how to wire the click event to my button since it cannot be referenced. I have my codes attached.

I will appreciate any assistance while I continue to search the forum for possible prior solution to this type of question

ASPX Codes:
===========

<telerik:RadGrid ID="grdExtrUntReq"  runat="server" AllowPaging="True" CellSpacing="0" CssClass="RadGridSearch" GridLines="None" OnNeedDataSource="grdExtrUntReq_NeedDataSource" PageSize="10"> <MasterTableView AutoGenerateColumns="False"> <NoRecordsTemplate> No records </NoRecordsTemplate> <RowIndicatorColumn Visible="True"> <HeaderStyle Width="20px"></HeaderStyle> </RowIndicatorColumn> <ExpandCollapseColumn Visible="True"> <HeaderStyle Width="20px"></HeaderStyle> </ExpandCollapseColumn> <Columns> <telerik:GridTemplateColumn DataField="personid" HeaderText="ID" UniqueName="TemplateColumn"> <ItemTemplate> <asp:Label ID="lblID" runat="server" Text='<%# Eval("personid") %>'></asp:Label> <asp:HiddenField ID="hfID" runat="server" Value='<%# Eval("personid") %>' /> </ItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn DataField="fullname" HeaderText="Full Name" UniqueName="TemplateColumn1"> <ItemTemplate> <asp:Label ID="Label1" runat="server" Text='<%# Eval("fullname").ToString() %>'></asp:Label> </ItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn DataField="ayear" HeaderText="Year" UniqueName="TemplateColumn2"> <ItemTemplate> <asp:Label ID="Label2" runat="server" Text='<%# Eval("ayear").ToString() %>'></asp:Label> </ItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn DataField="levelcode" HeaderText="Level" UniqueName="TemplateColumn3"> <ItemTemplate> <asp:Label ID="Label3" runat="server" Text='<%# Eval("levelcode").ToString() %>'></asp:Label> </ItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn DataField="semcode" HeaderText="Seminoles" UniqueName="TemplateColumn4"> <ItemTemplate> <asp:Label ID="Label4" runat="server" Text='<%# Eval("semcode").ToString() %>'></asp:Label> </ItemTemplate> </telerik:GridTemplateColumn> </Columns> <NestedViewTemplate> <telerik:RadListView  ID="lvExtrUntReqApprovalList" runat="server" OnNeedDataSource="lvExtrUntReqApprovalList_NeedDataSource" ItemPlaceholderID="phExtraUntReq"> <LayoutTemplate> <fieldset> <legend style="padding: 5px;">Request Details </legend> <asp:PlaceHolder ID="phExtraUntReq" runat="server"></asp:PlaceHolder> </fieldset> </LayoutTemplate> <ItemTemplate> <table> <tr> <td style="font-style:italic;">Full Name:</td> <td style="font-weight:bold"> <asp:Label ID="Label8" runat="server" Text='<%# Eval("fullname") %>'> </asp:Label> </td> </tr> <tr> <td style="font-style:italic;">Overall Grade:</td> <td style="font-weight:bold"> <asp:Label ID="Label9" runat="server" Text='<%# Eval("grade") %>'> </asp:Label> </td> </tr> <tr> <td style="font-style:italic;">Requested Unit(s):</td> <td style="font-weight:bold"> <asp:Label ID="Label10" runat="server" Text='<%# Eval("unitrequested") %>'> </asp:Label> </td> </tr> <tr> <td style="font-style:italic;">Request Date & Time:</td> <td style="font-weight:bold"> <asp:Label ID="Label12" runat="server" Text='<%# Eval("daterequested") %>'> </asp:Label> </td> </tr> <tr> <td>Approve/Reject Request:</td> <td> <asp:CheckBox ID="chkAprv" runat="server" Text="Approve" /> <asp:CheckBox ID="chkRej" runat="server" Text="Reject" /> <cc1:MutuallyExclusiveCheckBoxExtender ID="chkAprvE" runat="server" TargetControlID="chkAprv" Key="AprvRej" /> <cc1:MutuallyExclusiveCheckBoxExtender ID="chkRejE" runat="server" TargetControlID="chkRej" Key="AprvRej" /> </td> </tr> <tr> <td style="font-style:italic;">Unit(s) Approved:</td> <td style="font-weight:bold"> <asp:DropDownList ID="ddlUntAprv" runat="server"> <asp:ListItem Text="Select..." Value=""></asp:ListItem> <asp:ListItem Text="1" Value="1"></asp:ListItem> <asp:ListItem Text="2" Value="2"></asp:ListItem> <asp:ListItem Text="3" Value="3"></asp:ListItem> <asp:ListItem Text="4" Value="4"></asp:ListItem> <asp:ListItem Text="5" Value="5"></asp:ListItem> <asp:ListItem Text="6" Value="6"></asp:ListItem> <asp:ListItem Text="7" Value="6"></asp:ListItem> <asp:ListItem Text="8" Value="6"></asp:ListItem> <asp:ListItem Text="9" Value="6"></asp:ListItem> <asp:ListItem Text="10" Value="6"></asp:ListItem> <asp:ListItem Text="11" Value="6"></asp:ListItem> <asp:ListItem Text="12" Value="6"></asp:ListItem> </asp:DropDownList> </td> </tr> <tr> <td> <asp:Button ID="btnExUntReq" runat="server" Text="Submit" onclick="btnExUntReq_Click" /></td> </tr> </table> </ItemTemplate> </telerik:RadListView> </NestedViewTemplate> <EditFormSettings> <EditColumn FilterControlAltText="Filter EditCommandColumn column"> </EditColumn> </EditFormSettings> </MasterTableView> </telerik:RadGrid>

CS Codes
========

protected void grdExtrUntReq_NeedDataSource(object source, GridNeedDataSourceEventArgs e) { 

//Get year<br>        LookUpRecordsInformation l1 = LookUps.GetApplicationSettingValues("CURRENT_YEAR");<br>        string sYear = l1.sSettingValue;<br><br>        //Get seminole<br>        LookUpRecordsInformation l2 = LookUps.GetApplicationSettingValues("CURRENT_SEMINOLE");<br>        string sSeminole = l2.sSettingValue;<br><br>        string sApproverID = Page.User.Identity.Name.ToString();<br><br>        grdExtrUntReq.DataSource = GetRecords.GetUnitRequestListForApproval(sYear, sSeminole, sApproverID);<br>    }<br><br>    protected void lvExtrUntReqApprovalList_NeedDataSource(object sender, RadListViewNeedDataSourceEventArgs e)<br>    {<br><br>        //Get year<br>        LookUpRecordsInformation l1 = LookUps.GetApplicationSettingValues("CURRENT_YEAR");<br>        string sYear = l1.sSettingValue;<br><br>        //Get seminole<br>        LookUpRecordsInformation l2 = LookUps.GetApplicationSettingValues("CURRENT_SEMINOLE");<br>        string sSeminole = l2.sSettingValue;<br><br>        GridDataItem parentItem = ((sender as RadListView).NamingContainer as GridNestedViewItem).ParentItem as GridDataItem;<br>        string sID = (parentItem.FindControl("hfID") as HiddenField).Value;<br>        (sender as RadListView).DataSource = GetRecords.GetUnitRequestList(sID, sYear, sSeminole);<br>    }<br><br><br>        protected void btnExUntReq_Click(object sender, EventArgs e)<br>    {<br>        //Got completely lost here....on how to wire button btnExUntReq to fire the codes to perform my updates<br>    <br>    bool success = UpdateRecords.UpdateUntRequestList(sID, sYear, sSeminole);<br>    }

5 Answers, 1 is accepted

Accepted

answered on 09 Jun 2013, 12:48 AM

I really appreciate your response. Please, if you can still assist with this. I am having issues finding a label placed inside the NestedViewTemplate from within the Click even handler of the button.

    protected void btnExUntReq_Click(object sender, EventArgs e)
    {
      // Get button
        Button btn = sender as Button;
        // Get current NestedViewTemppate row
        GridNestedViewItem CurrentItem = btn.NamingContainer as GridNestedViewItem;
        // Get Parent Item
        GridDataItem ParentItem = CurrentItem.ParentItem as GridDataItem;//Got NullReferenceException: Object reference not set to an instance of an object.
        Label mLbl = ParentItem .FindControl("lblTest") as Label;
        mLbl.Text = "Hello";
    }

answered on 10 Aug 2013, 03:38 AM

Jayesh/Forum folks,

Maybe I did not make myself clear in my earlier post. Here is the declarative part of my aspx containing a NestedViewTemplate that I populated with single record returned from the database based on the muti-row returned from the parent Radgrid control. On the NestedViewTemplate, I have a button with event hadler where I need to get the values of the labels then save their values back into the database after a file is uploaded.

My request is that I need to figure out how to get the labels inside the NestedViewTemplate. I have tried the method you suggested earlier but I got null reference error message. I really need to do this inside a button click on the NestedViewTemplate.

I will appreciate any assistance.

<NestedViewTemplate>

<telerik:RadListView ID="lvStuCurr" runat="server" OnNeedDataSource="lvStuCurr_NeedDataSource"

ItemPlaceholderID="phCourseCode">

<LayoutTemplate>

<fieldset>

<legend style="padding: 5px;">Submit Completed Assignment </legend>

<asp:PlaceHolder ID="phCourseCode" runat="server"></asp:PlaceHolder>

</fieldset>

</LayoutTemplate>

<ItemTemplate>

<table>

<tr>

<td style="font-style: italic;">

Course Code:

</td>

<td style="font-weight: bold">

<asp:Label ID="lblTemplCourseCode" runat="server" Text='<%# Eval("CourseCode") %>'>

</asp:Label>

<asp:Label ID="Label1" runat="server" Text="Hello">

</asp:Label>

</td>

</tr>

<tr>

<td style="font-style: italic;">

Lesson:

</td>

<td style="font-weight: bold">

<asp:Label ID="lblTemplLesson" runat="server" Text='<%# Eval("lesson") %>'>

</asp:Label>

</td>

</tr>

<tr>

<td style="font-style: italic;">

Exercise:

</td>

<td style="font-weight: bold">

<asp:Label ID="lblTemplExercise" runat="server" Text='<%# Eval("exercise") %>'>

</asp:Label>

</td>

</tr>

<tr>

<td style="font-style: italic;">

Upload:

</td>

<td>

<telerik:RadAsyncUpload ID="aUpAssgnUpld_1" runat="server" MaxFileSize="1049000"

MultipleFileSelection="Automatic" TemporaryFolder="../images/AssignUpload/TempAttach"

OnClientFileUploaded="onClientFileUploaded">

</telerik:RadAsyncUpload>

</td>

</tr>

<tr>

<td>

</td>

<td>

<asp:Button ID="btnUpldAssign" runat="server" Text="Submit" OnClick="btnUpldAssign_Click" />

</td>

</tr>

</table>

</ItemTemplate>

</telerik:RadListView>

</NestedViewTemplate>

answered on 14 Aug 2013, 02:25 PM

Hi Abdul,

You could use the following approach in order to find the GridNestedViewItem.

protected void btnUpldAssign_Click(object sender, EventArgs e)

{

Control control = sender as Control;

bool isNestedViewItemFound = false;

do

{

if (control is GridNestedViewItem)

{

isNestedViewItemFound = true;

}

else

{

control = control.NamingContainer;

}

while (!isNestedViewItemFound);

GridNestedViewItem nestedViewTempalte = control as GridNestedViewItem;

Label label = nestedViewTempalte.FindControl("Label1") as Label;

}

Regards,
Kostadin
Telerik

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