How To Make Inline Eval If Control

Apr 9, 2010

How to make inline eval if control ?

[code]....

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I have a listview control on an .aspx page. Inside this list view i want to check "Type" property which comes from database. here is the example code :

[code]...

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Inline Code In A Server Control?

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<form id="form1" runat="server" method="post" action="Default.aspx?id=<%= ID %>" >

Ok, it is very ugly and I wouldn't have ever tried it myself. It came up in some code that was written years ago but had been working up until this weekend after a bunch of updates were installed on a client's web server where the code is hosted.

The actual result of this is the following html:

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The url ends up like this:

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Edit
Ok, I found a "fix"

<form id="form1" runat="server" method="post" action='<%# String.Format("Default.aspx?id={0}", 5) %>' >

But that requires me to call DataBind which is adding more of a hack to the original hack. Guess if nobody thinks of anything else I'll have to go with that.

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I have a simple user control (myControl.ascx) , in the myControl.ascx.cs file, I defined:

public string sUserName
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get
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return _sUserName;
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set
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populateData();
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In one of my aspx page, I use this control:

[Code]....

myNameSapce.Config.sType is a public value from a class, I just can't get that value for above inline code, is it possible to do that? Otherwise, I need go to the .cs file to do this: myControl1.sUserType = myNameSapce.Config.sType; But still hope I can do the inline code.

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Edit:
Got some good answers, but what I'm looking for is how to do this specifically in a normal HyperLink (not in a DataGrid/GridView) and inline (not via a function call or code behind).

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C# - Can't Initialize A User Control Property Using Eval

Feb 23, 2010

I designed a user control. It contains a public property "CurrentValue". When I try to initialize the property using an Eval expression, a null value is assigned.

// In below code, label assignment is OK, RatingNull user control assignment get null

<asp:TemplateField>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("Difficulty") %>'
<uc1:RatingNull ID="RatingNull1" runat="server" CurrentValue='<%# Eval("Difficulty") %>' />
</ItemTemplate>

If I directly assigned a value (ie, CurrentValue="5"), user control works fine.

public partial class RatingNull : System.Web.UI.UserControl
{
private string _CurrentValue;
public string CurrentValue
{
get { return _CurrentValue; }
set { _CurrentValue = value; }
}
(...)

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C# - Getting Eval To Work In A Databound, Templated Custom Control?

Sep 29, 2010

Context

I'm putting together a templated, databound control. Presently it works with the following syntax...
<cc:ItemChooserControl ID="ItemChooser" runat="server">
<TitleTemplate>
<h4><%# DataBinder.Eval(Container.DataItem, "DisplayName") %></h4>
</TitleTemplate>
</cc:ItemChooserControl>

Problem

What I would like though is that the shorter, simpler Eval would work instead.
<h4><%# Eval("DisplayName") %></h4>
What I get however when using straight Eval is an error:
Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.

Code

I'm databinding to a custom HtmlTableCell...
public class TitleTemplateTableCell: HtmlTableCell, INamingContainer
{
private object m_DataItem;
public virtual object DataItem
{
get { return m_DataItem; }
set { m_DataItem = value; }
}
}

With the following custom DataBind (non-related code removed)...

foreach (object dataItem in dataSource) {
TitleTemplateTableCell title = new TitleTemplateTableCell();
TitleTemplate.InstantiateIn(title); // TitleTemplate is the template property
title.DataItem = dataItem;
title.DataBind();
}

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I was using

<%# Bind("FirstName")%> but noticed
<%# Eval("FirstName")%> works just as well.

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<SelectParameters>
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I also need to ensure that the SQL source and gridview rebind when the pager is activated.

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I am getting the following error

Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.

but all I am trying to do is inside a ASP.NET REPEATER Control

<% if ( Eval("Message").ToString() == HttpContext.Current.Profile.UserName) %>
<% { %>
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<% } %>

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Error - Databinding Methods Such As Eval(), XPath(), And Bind() Can Only Be Used In The Context Of A Databound Control

Aug 11, 2010

[code]....

gives me error: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.

I could write : <%# Eval("SaveDate") != DBNull.Value ? do magic But I need to do lots of html magic in if statement.

I know I should add # in order to use Eval, but not sure about correct syntax.

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Forms Data Controls :: Eval(), XPath(), And Bind() Can Only Be Used In The Context Of A Databound Control?

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I have a big problem...I have made a page has a Data FormView controland the insert template of this Formview control has DropDownList to allow the user to choose section (SectionsDDList)..and there's also another DropDownList allow the user to choose a teacher (TeachersDDList)...more infothe SectionsDDList get the section list from SqlDataSource control which the "Select Command" of is:"SELECT section_id,section_id FROM sections"the TeachersDDList get the teachers list from another SqlDataSource control which the "Select Command" of is:"SELECT teacher_id,teacher_name FROM teachers WHERE (section_id = @section_id)"finallyI want the TeachersDDList to be filled with teachers according to the selected section from the SectionsDDList...So,I enable the Auto postBack function of the SectionsDDListand add the next code for the SectionsDDList_SelectedIndexChanged event:TeachersDataSource.SelectParameters["section_id"].DefaultValue = ((DropDownList)sender).SelectedValue;be aware that both of the SectionsDDList & TeachersDDList have been Bounding to a column...and the problem I have faced is that:Exception Details: System.InvalidOperationException: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.maybe you want to know the Stack Trace:[InvalidOperationException: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.]

System.Web.UI.Page.GetDataItem() +93
System.Web.UI.TemplateControl.Eval(String expression) +33
ASP.cpanel_managecourses_aspx.__DataBinding__control82(Object sender, EventArgs e) in

[code]...

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[Code]....

All is good until i put

[Code]....

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[Code]....

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