I’m having problems with the following.
The scenario:
I have a asp grid with a few columns that bind to data. The last column has been converted to a template-field. In this template-field is a button with a modal popup extender attached to it. Hidden inside this field is a modal popup. This modal popup is used to add a new account. it contains 2 text boxes, drop down lists and buttons(“Add” and “Cancel”). When “add” is clicked the modal should close after the inserting of the new account in the code behind.
The Problem:
I get the popup to display and load the Drop down lists from the cache, without problem. How do I get the button click event to fire in the code behind. I’ve tried using a JavaScript function that performs a _doPostBack(‘btnAddAcc’,”) but it keeps returning the error “JavaScript error: Object expected”. I gathered after about 1 hour on Google that it is because “btnAddAcc’ is not found because it is actually within the grid-view cell and can’t be directly accessed. Using page methods and ajax calls is a last resort as the company has a strict policy against this and only allowes this after a bunch of paperwork.
The Code:
<asp:GridView ID="gvNEA" runat="server" CssClass="gridA_Orange"
AutoGenerateColumns="False" AllowPaging="True"
EmptyDataText="No transactions with 'Non Existent Account(s)'"
ShowHeaderWhenEmpty="True" Width="945px">
<Columns>
<asp:BoundField HeaderText="Transaction Date" DataField="Transaction_Date" />
<asp:BoundField HeaderText="Account Number" DataField="Account_Number" />
<asp:BoundField HeaderText="Description" DataField="Description"/>
<asp:BoundField HeaderText="Amount" DataField="Amount"/>
<asp:BoundField HeaderText="Offset Account" DataField="OffsetAccount" />
<asp:BoundField HeaderText="File Name" DataField="FileName" />
<asp:BoundField HeaderText="Transaction Type" DataField="TransType" />
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:Button ID="btnAdd" runat="server" CausesValidation="false"
OnClientClick="showPopUp('pupAddAcc');" Text="Add Account" CssClass="ButtonStyle_Gray" />
<asp:ModalPopupExtender ID="mpeAddAcc" runat="server"
BackgroundCssClass="modalBackground" TargetControlID="btnAdd"
PopupControlID="pnlAddAcc"
CancelControlID="btnCancelAddAcc" DropShadow="True"
Enabled="True">
</asp:ModalPopupExtender>
<div id="pupAddAcc">
<asp:Panel ID="pnlAddAcc" runat="server" BackColor="White"
BorderColor="White" BorderStyle="Solid" BorderWidth="1px" Width="430">
<table align="center" id="tblAddAcc" class="BasicHTMLTable">
<asp:HiddenField ID="hfTransType" runat="server" Value='<%# Bind("TransType") %>' />
<tr align="center" >
<td colspan="2">
<asp:Label ID="lblAccountHeader" runat="server" width="390px" Text="Add Account"
CssClass="ButtonStyle_Orange" Height="25px" Font-Bold="true" Font-Size="Large" />
</td>
</tr>
<tr>
<td align="right" class="PopupCol">Account Number</td>
<td align="left" ><asp:Label ID="lblAccNumber" runat="server" Width="165px"
Text='<%# Bind("Account_Number") %>' /></td>
</tr>
<tr>
<td align="right" class="PopupCol" >Name</td>
<td align="left" ><asp:TextBox ID="txtName" runat="server" Width="165px" />
<asp:RequiredFieldValidator ID="rfvName" runat="server"
ControlToValidate="txtName" Text="*" ValidationGroup="acc" />
</td>
</tr>
<tr>
<td align="right" class="PopupCol" >Search Name</td>
<td align="left" ><asp:TextBox ID="txtSearchName" runat="server" Width="165px" />
<asp:RequiredFieldValidator ID="rfvSName" runat="server"
ControlToValidate="txtSearchName"
Text="*" ValidationGroup="acc" />
</td>
</tr>
<tr>
<td align="right" class="PopupCol" >Group</td>
<td align="left" >
<asp:DropDownList ID="ddlGroup" runat="server" Width="170">
</asp:DropDownList>
</td>
</tr>
<tr>
<td align="right" class="PopupCol" >Currency</td>
<td align="left" >
<asp:DropDownList ID="ddlCurrency" runat="server" Width="170px">
</asp:DropDownList>
</td>
</tr>
<tr>
<td align="center" colspan="2">
<asp:Button ID="btnAddAcc" runat="server" Text="Add Account"
CssClass="ButtonStyle_Orange" OnClientClick="javascript:addAccount()"
ValidationGroup="acc" />
  
<asp:Button ID="btnCancelAddAcc" runat="server" Text="Cancel" CssClass="ButtonStyle_Orange" />
</td>
</tr>
</table>
</asp:Panel>
</div>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="RecId" DataField="RecId" Visible="False"/>
</Columns>
I open the popup with this JavaScript function:
function showPopUp(p) {
var Popup = document.getElementById(p);
Popup.style.visibility = "visible";
Popup.style.display = "";
}
The function when btnAddAcc is clicked:
function addAccount() {
_doPostBack('btnAddAcc', '');
};
The code behind function
Protected Sub btnAddAcc_Click(sender As Object, e As System.EventArgs)
'Code for inserting new account goes here
End Sub
Thank you in advance for any help and proposals.
Regards
Answers:
Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.
Method 1
What happens if you set the OnClick to your server-side event?
<td align="center" colspan="2">
<asp:Button ID="btnAddAcc" runat="server" Text="Add Account"
CssClass="ButtonStyle_Orange" OnClick="btnAddAcc_Click"
ValidationGroup="acc" />
  
<asp:Button ID="btnCancelAddAcc" runat="server" Text="Cancel" CssClass="ButtonStyle_Orange" />
</td>
But… the correct way to get an event reference (i.e. the ‘__doPostback’ thing) is to get it server-side with ClientScript.GetPostBackEventReference
Method 2
I found the answer eventually. I had to use the gridview.RowCommand event. It handles all button related events inside a cell of a gridview.
Have a look at the msdn documentation. It should explain most of this command.
Regards George
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0