I am so frustrated. Using asp.net GridView. Using a LinkButton with the CommandName="Delete". Don't understand why the page isn't posting back. I've done this a million times in other apps. I've compared them against one another and nothing appears different. I will preface by saying this IS someone else's template, however, so it's not my same template.
Any ideas what might be causing my issues?
My scenario is this:
ASPX Page (edited to add the HTML; there's more HTML in the site.Master and there's also a tag for the AjaxControlToolkit at the top of the page):
<div class="width80 container body-content">
<h2 class="marginTop50">Message Board</h2>
<asp:Panel ID="pnlMsgsForUser" runat="server" Visible="false">
<div class="jumbotronSmallFont">
<asp:Label ID="lblErrorMessage" CssClass="has-error" runat="server"></asp:Label>
</div>
</asp:Panel>
<div class="jumbotronSmallFont">
<h4>New Message</h4>
<form>
<div class="form-group">
<label for="messageBody">Message Body</label>
<textarea class="form-control" id="messageBody" rows="3" style="max-width: 600px;"></textarea>
</div>
<div class="text-center">
<button id="btnSave" class="btn btn-primary" style="width: 75px;">Save</button>
<button type="button" id="btnReset" class="btn btn-default marginLeft15px" style="width: 75px;">Reset</button>
</div>
</form>
</div>
<div>
<asp:GridView ID="gvMessages" runat="server" Width="100%"
CssClass="table adminMessageBoardTable marginAuto" AutoGenerateColumns="False"
OnRowUpdating="gvMessages_RowUpdating"
OnRowCancelingEdit="gvMessages_RowCancelingEdit"
OnRowDataBound="gvMessages_RowDataBound"
OnRowEditing="gvMessages_RowEditing"
OnRowDeleting="gvMessages_RowDeleting"
DataKeyNames="Id" BorderStyle="NotSet">
<Columns>
<asp:TemplateField HeaderText="Message" HeaderStyle-CssClass="center" SortExpression="Message">
<EditItemTemplate>
<asp:TextBox ID="txtMsg" Width="100%" runat="server"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label runat="server" Text='<%# Eval("MessageBody") %>' ID="lblMessage"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Date Updated" SortExpression="DateUpdated" HeaderStyle-CssClass="center" ItemStyle-CssClass="center">
<HeaderStyle Width="120px" />
<EditItemTemplate>
<asp:Label runat="server" ID="lblEditDateUpdated" Enabled="false"></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:Label runat="server" Text='<%# Eval("DateUpdated","{0:d}") %>' ID="lblDateUpdated"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Updated By" SortExpression="UpdatedBy" HeaderStyle-CssClass="center" ItemStyle-CssClass="center">
<HeaderStyle Width="120px" />
<EditItemTemplate>
<asp:Label runat="server" Text="" ID="lblEditUpdatedBy" Enabled="false"></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:Label runat="server" Text='<%# Eval("UpdatedBy") %>' ID="lblUpdatedBy"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ItemStyle-CssClass="center">
<HeaderStyle Width="120px" />
<EditItemTemplate>
<asp:LinkButton ID="lbUpdate" runat="server" CausesValidation="True"
CommandName="Update" Text="Update"
OnClientClick="return confirm('You are about to update this entry. \n\nDo you wish to proceed?');"></asp:LinkButton>
<asp:LinkButton ID="lbCancel" runat="server" CausesValidation="False"
CommandName="Cancel" Text="Cancel"></asp:LinkButton>
</EditItemTemplate>
<ItemTemplate>
<asp:LinkButton ID="lbEdit" runat="server" CausesValidation="False"
CommandName="Edit" Text="Edit"></asp:LinkButton>
<asp:LinkButton ID="lbDelete" runat="server" CommandArgument='<%# Eval("Id") %>' CausesValidation="False"
CommandName="Delete" Text="Delete" OnClientClick="return confirm('You are about to delete this entry. \n\Do you wish to proceed?');"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</div>
In my code-behind, I have:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
var user = CommonFunctions.GetUserID(true);
var Admin = Roles.IsUserInRole(user, "Administrator");
var Dev = Roles.IsUserInRole(user, "Developer");
if (!Admin && !Dev)
{
Response.Redirect("~/");
}
gvBind(true);
}
}
When I click on the Delete linkbutton for a row, it drops into the Page_Load and
!Page.IsPostBack
verifies as true. I have no idea why it's doing this. It also never even hits the RowDeleting command. My breakpoint is so sad.
In my other app, all the markup and code-behind are pretty much the same. The only differences are the gridview name and the Eval tags. But when I click Delete in that app, it skips the !Page.IsPostBack section. :( It also obviously fires the RowDeleting.
I've also tried implementing RowCommand, but that event never fires either. It only does Page_Load and RowDataBound before essentially refreshing the page.
Any ideas?
Please, and thanks!!!
Your code is working fine. When I click Delete button, it triggers gvMessages_RowDeleting event. Here is how I test it -
<asp:GridView ID="gvMessages" runat="server" Width="100%"
CssClass="GridView marginAuto" AutoGenerateColumns="False"
OnRowDeleting="gvMessages_RowDeleting"
DataKeyNames="Id">
<Columns>
<asp:TemplateField HeaderText="Message" HeaderStyle-CssClass="center" SortExpression="Message">
<ItemTemplate>
<asp:Label runat="server" Text='<%# Eval("MessageBody") %>' ID="lblMessage"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ItemStyle-CssClass="center">
<ItemTemplate>
<asp:LinkButton ID="lbDelete" runat="server" CommandArgument='<%# Eval("Id") %>' CausesValidation="False"
CommandName="Delete" Text="Delete"
OnClientClick="confirm('You are about to delete this entry. \n\Do you wish to proceed?');"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
public class Item
{
public int Id { get; set; }
public string MessageBody { get; set; }
}
public partial class _Default : Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
gvMessages.DataSource = new List<Item>
{
new Item {Id = 1, MessageBody = "One"},
new Item {Id = 2, MessageBody = "Two"},
new Item {Id = 3, MessageBody = "Three"},
};
gvMessages.DataBind();
}
}
protected void gvMessages_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
}
}