User425811032 posted
Hello
I have a problem where I need to add a DataBindingHandler to my User Control so that the data bound to it will remain through paging in a gridview where this control is added inside and bound through DataBinder.Eval.
If you rather just test and insert then I have uploaded the project here:
https://ufile.io/pspmg
First I have my default.aspx, where I simply refer to my WebUserControlLister.ascx:
<%@ Register Src="~/Control/WebUserControlLister.ascx" TagPrefix="uc1" TagName="WebUserControlLister" %>
<!DOCTYPE html>
<head runat="server">
</head>
<body>
<uc1:WebUserControlLister runat="server" id="WebUserControlLister" />
</body>
</html>
In the WebUserControlLister I have the following markup:
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControlLister.ascx.cs" Inherits="Control_WebUserControlLister" %>
<%@ Register Src="~/Control/WebUserControlSplash.ascx" TagPrefix="uc1" TagName="WebUserControlSplash" %>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>" SelectCommand="SELECT [EventName], [EventId], [EventSecret], [JustAbit] FROM [JustATestTable]">
</asp:SqlDataSource>
<asp:GridView ID="GridView1" Width="100%" runat="server" AllowPaging="True" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" PageSize="3" >
<Columns>
<asp:TemplateField HeaderText="EventSecret" ShowHeader="False">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "EventSecret") %>'></asp:Label>
<uc1:WebUserControlSplash runat="server" eventSecret='<%#DataBinder.Eval(Container.DataItem, "eventSecret") %>' ID="WebUserControlSplash1" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
(Note: for now, I had a GridView1.DataBind() on the load event on the WebUserControlLister, but that should not be required at all if I get the DataBindingHandler to work, so that it works like the Label component sat right next to it - as I want my user
control to act like the text property does in the label, as when I use the paging control the data is not passed to the WebUserControlSplash, but the label works fine)
Inside my WebUserControlSplash I have a very simple markup(test), I simply put a button that In want to set the Text property of with the value of the eventSecret.
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControlSplash.ascx.cs" Inherits="Control_WebUserControlSplash" %>
<asp:Button ID="Button1" runat="server"/>
As for the codebehind(c#) for the WebUserControlSplash (where I need help Implementing DataBindingHandler, so I can set the button text in design time)
using System;
using System.Collections;
using System.Web.UI;
using System.Web.UI.Design;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Runtime;
using System.Reflection;
[ControlValueProperty("Text"),
DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"),
DefaultProperty("Text"),
ParseChildren(false)]
public partial class Control_WebUserControlSplash : System.Web.UI.UserControl
{
[
Bindable(true),
DefaultValue(""),
PersistenceMode(PersistenceMode.InnerDefaultProperty)
]
public virtual string eventSecret
{
get
{
object o = ViewState["eventSecret"];
return ((o == null) ? String.Empty : (string)o);
}
set
{
ViewState["eventSecret"] = value;
}
}
public override void DataBind()
{
if (!String.IsNullOrEmpty(eventSecret))
{
Button1.Text = eventSecret;
}
else
{
Button1.Text = "IsNullOrEmpty, Error Here!";
}
base.DataBind();
}
protected void Page_Load(object sender, EventArgs e)
{
//if (!String.IsNullOrEmpty(eventSecret))
//{
// Button1.Text = eventSecret;
//}
//else
//{
// Button1.Text = "IsNullOrEmpty, Error Here!";
//}
}
Sadly above does not work, if you can see what I did wrong then please correct me, or you can try and see what is wrong by quickly opening the linked to project in the top.
I have been stuck at this for days, tried multiple things but nothing worked so far - I could not find anybody who has the same requirement as me, so I have tried putting things together, nothing worked so far.
Thank you in advance.
