C# - Retrieving ListView Using FindControl?
Feb 13, 2011
I am trying to retrieve two listviews from an ascx control for the purpose of saving them to a PDF file:
<TagCloud:TagCloudControl ID="TagCloudControl1" runat="server" />
I get the following error: TagCloudControl1 is a field but is used like a type and an object reference is required for the non-static field, method or property..
ListView lv1 = (TagCloudControl1)ListView.FindControl("ListView1");
ListView lv2 = (TagCloudControl1)ListView.FindControl("ListView2");
lv1.RenderControl(htWriter);
lv2.RenderControl(htWriter);
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Apr 16, 2010
I stumbled into a problem which is that FindControl will only return a control in the ListView after the listview has been databound. Here is the code which is not working, and I'm getting the "Object reference not set to an instance of an object error" when I try to add the attribute to the control:
[Code]....
Any ideas on how I can elegantly fix this?
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Jun 29, 2010
I'm trying to do a relatively simple thing, but just cannot get it to work. I'm trying to find a dropdownlist within a ListView ItemTemplate within Page_Load.
This is the code
[Code]....
And this is the C#
[Code]....
I have also tried without this > this.ListView1
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Jul 18, 2010
I have ListView and in the ItemTemplate I have:
[Code]....
in code behind I'm doing:
[Code]....
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Jan 29, 2010
I am trying to use the photo_id of a picture whilst a user uses a datapager to select different images. I am also getting the photo_id of the pictures through a label within the listview. However now i need that value so i pull out comments from another table according to this photo_id. I currently have th following code:-
PHP Code:
<asp:ListView ID="lvPhotoViewer" runat="server" GroupItemCount="1"
onselectedindexchanged="lvPhotoViewer_SelectedIndexChanged">
<LayoutTemplate>
<table ID="groupPlaceholderContainer" runat="server" border="1">
<tr ID="groupPlaceholder" runat="server">
</tr>
</table>
</LayoutTemplate>
<ItemTemplate>
<td id="Td4" align="center" style="background-color: #eeeeee;">
<asp:Image runat="server" ID="imPhoto" Height="450px" Width="450px" ImageUrl='<%# string.Format("~/photos/{0}", Eval("photo")) %>' />
<br />
<asp:Label ID="DefaultPhotIDLabel" runat="server" Text='<%# Eval("photo_name") %>' />
[B][U] <asp:Label ID="Label5" runat="server" Text='<%# Eval("photo_id") %>'/>[/U][/B]
</td>
</ItemTemplate>
<GroupTemplate>..............
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Feb 21, 2011
i am trying to develop forum page in asp.net using c#. I have listed forum threads lists as Title, Description, Posted On, Posted By like that using Listview. Now my idea is if the user clicks anyone of the title from the list the control will move to new page. there based on thread title selected from listview i would like to display the reply msgs posted for that. i am struggling lot here.
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May 11, 2010
I have this listview
<asp:ListView ID="ListView1"
runat="server"
onpagepropertieschanging="ListView1_PagePropertiesChanging"
onitemdatabound="ListView1_ItemDataBound">
[Code]....
What I want is to be able to click on the button: btnAddCart and then in the code behind retrieve the value of product name (Eval("Prouct")) and price (%#Eval("Price","{0:#}")%) for that particular row/itemtemplate.
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Dec 19, 2010
I have created a asp.net webpage for viewing daily downloaded newspaper, saved as a pdf file in a selected folder (~/NEWS/{0}) within the web root directory. Also i have a SQL datasource linked, where the news table has two columns viz: date and filename.
I want to create a tiled listview where the date text is visible on the hyperlink. on clicking the hyperlink, the file name is retreived for the corresponding date and the pdf file opens in a fresh page.
I have tried going to the item template in listview and replacing the label control with a hyperlink control, but then not able to successfully proceed ahead.
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Jan 17, 2011
I have something like this:
[Code]....
[Code]....
This does NOT work. What's wrong here?How do I accomplish my goal? I MUST use the Button1_Click event for this one.
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Feb 19, 2010
If I have the ListView on a mode which only displays data (no editing or inserting), how do I reference data in a list view item using the code behind?
In other controls I have used e.Items and e.Values, but I can't seem to work out how to do it in the listview.
For example if I wanted to set the image based on a database column (I know I can do this in the HTML but just for the purpose of the example, what would I put in place of the *** below:
[Code]....
I am using the SQLDataSource.
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Feb 4, 2010
I have a ListView, I've setup to use an ObjectDataSource, I've created my Layout and Item templates, and I'm able pull and view a list of my data no problem. However I want to add delete capabilities to my
ListView and my reference material tells me to go into the "Configure ListView..." option under the ListView's smart tag, the only problem is I don't have that option, the only three options in my smart tag are "Choose DataSource", "Configure DataSource..." and "Refresh Schema", what am I doing wrong?
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Mar 13, 2011
I have anested ListView control. I also implemented a jQuery to automatically expand the TextBox control inside of the nested ListView Insert Template. The problem is, when the Textbox expand, the outer ListView control is not; therefore, the Textbox control expands underneath the buttons of the outer listView control. How do I expand the outer ListView control as the nested ListView textbox is automatically expand? One great example is in Facebook where if I add a response comment, it'll automatically push any comments below mine down. If nested Listview control is not the best way to do this, what are my options?
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May 11, 2010
Does anyone have an example for how to create a Dynamically Templated Listview with prefernces page to specify which columns & column order)? Also the listview would also have Edit, delete and insert options if possible. And uses the n-tier approach with Bus Layer and does NOT use LINQ.
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Jan 6, 2011
Is there any way to enable alternative ListView (LV2) or any other control in case when ListView (LV1) returns no records from DB? I already have emptydatatamplate designed for this case, but I need to enable a new ListView below in this particular case and I don't know how to achieve this!
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Sep 30, 2010
I try to datbind a listview which is inside another listview InsertItemTemplate.
[Code]....
I'm binding the listivew in the parent listview onitemcreated events. I receive the error Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.
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Aug 26, 2010
I am having trouble finding how to solve the following issue :
I am using nested listviews to display Sales and Sales details.
The main ListView displays General Information about Sales and the child ListView displays the detailed information about one sale. the child listview is shown only when the user clicks on a link (see included code, DataBind is made on PageLoad) :
ASPX Markup Code :
[Code]....
C# Behind Code :
[Code]....
If I removed the datapager part, I can manage show/hide the child list view on the button click event. but if I want to use the DataPager with the PreRender event handling, the child listview is not longer shown on button click.
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Apr 2, 2011
I am trying to implement a nested user control in listview and the user control doesn't get bound.
Here is my code.
[Code]....
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Aug 17, 2010
Ok, background first:
The form allows a user to create and edit one estimate.
Each estimate can contain multiple Jobs, which are represented in a ListView.
Each Job can contain multiple Parts, which are contained in a ListView that sits in each item of the Jobs ListView.
A user can add and remove as many Jobs as they want.
A user can add and remove as many Parts to/from each Job as they want.
I have no issues adding to each of these, but I do have a problem removing a single part from a single job.
For a reference, here is one Job in the Jobs ListView on the form:
I want to make sure that no matter what a user does, the part of the form they are working on saves what they have. Removing a row from that Parts ListView is no exception. What I want it to do is save the values in each of those textboxes and then delete the necessary row.
Here's what I have in the codebehind:
[Code]....
The EstimateRow variable I create does not get a value from theListView)HFERID.Parent.FindControl("LVEstimateRow") bit of code. There must be another level of nesting that I'm not accessing correctly, because it can't seem to find that nested ListView.
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Sep 20, 2010
I have a datakey defined on my outermost ListView. When I click on a linkbutton in a row in this listview, the second listview is displayed. This inner listview has several controls and also a linkbutton. When I click this linkbutton, it gets handled by its own event; linkbutton_click. In this event all the data is collected from the innermost listviews' controls, and sends it to the database. The only thing I need within this event is the datakey from the outermost listview.
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Sep 10, 2010
how to do this when the checkbox in listview layout template check select all checkboxes in listview itemtemplate.I dont give 'Eval 'field to checkbox present in itemtemplate.
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Mar 22, 2010
I am trying to populate the ListView using LinqDataSource data source but the issue I am having is.I need to load the listview on Search button click action.
IN the page_load I kept like this:
===========================================
LinqDS.Selecting += new EventHandler<LinqDataSourceSelectEventArgs>(LinqDS_Selecting);
protected void LinqDS_Selecting(object sender, LinqDataSourceSelectEventArgs e)
{
e.Result = ObjectDS;
}
=============================================
This works fine but this happens on page load,i want this binding to happen on button click?is there a way to do this?
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May 31, 2010
I have a ListView1 control that his <ItemTempleae> has a another ListView2. ListView2 is surrounded by <UpdatePanel> with trigger and also UpdateMode="Conditional". But, I don't know why ListView2 is not being update as it should, I need to refresh all the page to see the new data enter to ListView2 only. What is the problem? How can it be fixed? I think that the problem is something in the structure. There are about 10 ListView2 with updatepanel surronded them, so when I am looking to update a specific ListView2, it doesn't know which one to update because there are lots of them. What to do in order to solve that problem?
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Feb 17, 2011
How to handle the itemcommand event for the inner listview, here is my code:
[Code]....
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Jan 16, 2010
The thing I don't like about FindControl() is the string parameter. If the ID has been changed the compiler won't pickup the error. The error will only occur at runtime. It would be nice if we could get the reference using a method that the compiler would check at compile time?
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Mar 24, 2010
I have the below linqdatasource selecting event to populate my frontend asp.net listview. How do I find a control within my listview's ItemTemplate within this event? My attempted code returns the error: "Object reference not set to an instance of an object" on code line 80? From the debugger I know that "query.UserId;" returns a value so it's my "ratingControl" reference that the debugger can't find?...
[Code]....
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