Web Forms :: Cant Delete An Item In A Repeater. Event Validation Security?
Mar 23, 2011
I have a reorder list control from the ajax toolkit. When i click a delete button on any of the items i get this error:Server Error in '/' Application.Invalid postback or callback argument. Event validation is enabled using<pagesnableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifiesthat arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback datafor validation.Description: An unhandled exception occurred during the execution of the current web request. Please review thestack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentException: Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page nableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
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Jan 6, 2014
I have a repeater
<asp:Repeater ID="Repeater1" runat="server">
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Eval("ContactName") %>'></asp:Label><asp:Button ID="Button1" runat="server" Text="view repeater id" />
</ItemTemplate>
</asp:Repeater>
Now onclick button1 i have to get the repeater client id..
Actually my problem is to delete one of the div genereated by repeater on a button click...
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Apr 30, 2014
Working in Asp.net 4.5 + Kentico CMS
I have Repeater in usercontrol and Inside the repeater i have 1 itemtemplate in which i have ImageButton on it. Also i am handling the Click event on the Imagebutton using ItemCommand of the Repeater. when i click the image button it fires the item_command on the codebehind which is fine. But if i use !Ispostback on page load to stop loadinghte databind event again which is in pageload, it's not firing the Item_Command Event.
If i remove the !Ispostback from my page it's doing the pageload event againt which has calling my databind method and then it calls the Item_commands event. Wondering is this kentico issue or usercontrol problem?
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Dec 25, 2010
I am using one datalist control for uploading multiple images.I hv used one Asp:FileUplaod Control and one button in one itemtemplate.I am using reqired field validator and regular expression validator for file upload cntrl I am assigning validation group for both of them on ItemDataBound event of my datalist so that each upload cntrl hv same validaton group as required field and regular expression validator.Now what i want to do is - i want to show my error message in validation summary which is right at the top of the page.I want one know how to write javascript that will assign validation group of my control in datalist on which i click ?
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May 7, 2015
I have a repeater control. show my products. in the quantity column I have a textbox that fills from database, the problem is when I want to update the quantity from the textbox, how to get the id of the row repeater and the value of the textbox to update the record. try using the method OnTextChanged. or maybe Jquery?.
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Jan 17, 2014
How can I get current viewed itemindex of a repeater item template, have tried a few stuffs i got from google search, but it seems not to work.
I have items like:
1 text link1
2 text link2
3 text link3
4 text link4
where 1, 2, 3, 4 are the itemindex, i want to be able to get 1 if text link1 is clicked, or 2 if text link two is clicked etc.
Here is my repeater html
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Jun 17, 2010
I want to bind parent repeater item index in child repeater control using inline code not code behind side.
For example
[Code]....
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Oct 6, 2010
I have a repeater control:
<asp:Repeater ID="rep" DataSourceID="XMLDSCompare" runat="server">
<ItemTemplate>
<h4><%# XPath("title")%></h4>
</ItemTemplate>
</asp:Repeater>
Now if its the first item in the total resultset, I want to add <div> to ItemTemplate control, if its the 2nd item, I want to add </div>
So output would be (not including table tags generated by repeater control):
<div>
title 1
title 2
</div>
<div>
title 3
title 4
</div>
<div>
title 5
title 6
</div>
How would I do this in the ItemDataBound event of repeater control?
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Mar 29, 2011
I'm having trouble managing how to call upon databind from clicking on a row over an already populated repeater that will populate data regarding the row clicked TO another repeater on the same page.
I've succeeded doing that with postback, calling a jquery click event of that row, taking the data of the specific row and passing it onto a "Querystring" and after postpack, it will be pushed into a Session which the ObjectDataSource of the secondary repeater will recognize and populate the data tables accordingly.
The problem is, I must do it without a postback or in other words purely on client side.
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Jun 28, 2010
last year I inherited a webapplication that seems to refuse to run on a new hosting company's servers due to a "security violation"... Our old host was bought out and now sucks...So I uploaded the code to the new company - looking forward to some sleep and found that my life was about to get more complex.. I go the good old generic security error
System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Assembly asm, PermissionSet granted, PermissionSet refused, RuntimeMethodHandle rmh, SecurityAction action, Object
The biggest issue was that it didn't say where the error was.. Digging deeper (taking the code appart one block a time) the error was being triggered by the followin itemdatabound event. My host says it is because they are running under medium trust, but I am not seeing why this block should cause issues. Any help very much appreciated.
Sub dlstAlsoDish_ItemDataBound(ByVal s
As
Object,
ByVal e
As DataListItemEventArgs)
Handles dlstAlsoDish.ItemDataBound
If e.Item.ItemType = ListItemType.Item
Or e.Item.ItemType = ListItemType.AlternatingItem
Then
Dim lngDateType
As
Long = e.Item.DataItem("dateType")Dim
strEvent As
String =
"> " & e.Item.DataItem("restName") &
" :: " & e.Item.DataItem("eventName") &
" : "
Dim lnkAlsoEvent
As HyperLink = e.Item.FindControl("lnkAlsoEvent")Dim dtmStart
As DateTime = e.Item.DataItem("eventSrt")Dim dtmEnd
As DateTime = e.Item.DataItem("eventEnd")If lngDateType = 1
Then
strEvent = strEvent & Format(dtmStart, "MMM")ElseIf lngDateType = 2
Then
strEvent = strEvent & Format(dtmStart, "dd MMM") &
" TO " & Format(DateAdd(DateInterval.Day, -1, dtmEnd),
"dd MMM")Else
strEvent = strEvent & Format(dtmStart,"dd MMM")End
If
lnkAlsoEvent.Text = strEvent
lnkAlsoEvent.NavigateUrl = e.Item.DataItem("restURL") &
"/events.aspx#e" & e.Item.DataItem("eventID")ElseIf e.Item.ItemType = ListItemType.Header
Then
imgBorder.ImageUrl = strImageURLDim imgBorder
As Image = e.Item.FindControl("imgBorder")End
If
End
Sub
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Feb 2, 2011
I am using a repater whose item template is having a dropdownlist. Now i want to access that dropdownlist from a button click event. Here is the code iam using :
protected void btn1_Click(object sender, EventArgs e)
{
foreach (RepeaterItem item in rptWord.Items)
{
DropDownList ddl1 = (System.Web.UI.WebControls.DropDownList)rptWord.FindControl("ddlWord");
}
}
But m getting ddl1 as null. For this i created a function which is as follows:
public void myFunction(object sender, RepeaterItemEventArgs e)
{
foreach (RepeaterItem item in rptWord.Items)
{
DropDownList la = (System.Web.UI.WebControls.DropDownList)e.Item.FindControl("ddlWord");
}
}
using this function iam able to access the repeater but i guess its not possible to call this function on button click event .
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Feb 22, 2010
I need you assistance, Dynamic Delete LinkButton with CommandName=Delete gives me an error: Delete can only be called on a valid data item. nfact I am designing a Complex Grid using .Net 3.5 ListView Control with Scrollbar and Fixed Toolbar: This grid consist of 3 Tables:
1- footer
2- Toolbar Control
3- Scrolling Data Grid with Header
ListView give us only one ItemPlaceHolder to Bind Data as per LayoutTemplate, so I cannot able to manupulate my Toolbar Controls with ItemTemplate :(, therefore I decide to use ItemDataBound to add ImageButtons Dynamically using Init Page Event and I am able to get the result as you saw above:
ImageButton with funnel icon is with CommandName="Filter"
ImageButton with magnifier icon is with CommandName="View"
ImageButton with stop icon is with CommandName="Delete"
Now I can able to handle Filter and View with OnItemCommand Event but when I click Delete button I am getting an error as shown below: The grid used CSS I am sending you the HTML and code behind to resolved this problem: HTML CODE:
[Code]....
CODE BEHIND VB.NET
[Code]....
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Mar 18, 2011
I have two repeater which are nested..Means there is one repeater and inside that i have another repeater.
I want data in following format:
*Transaction Id:1xasd2*
Product1 2 500
*Transaction Id:2asd21*
Product2 1 100
Product3 2 200
So how can i achieve this?
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Mar 24, 2011
I am using aspnet menu control and i want to hide the item initially on page load and show the item after an event is trigger say button lick event Can any one give me an example?
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Sep 13, 2010
Below code, i need the RegularExpressionValidator on key press event/On change event. I need to validate same time while user doing input.
Code:
[code]....
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Nov 1, 2010
I added a Gridview to my page and added a new item a delete button, now when i push that button there is an error... Do I need to add some code for it? And yes, can you give an example?
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Aug 22, 2010
I have the following VB.NET repeater which builds a navigation menu.
[Code]....
This is my XML
[Code]....
I need to check if the item is last record in the repeater to add a class="last" attribute to the list item as follows:
[Code]....
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Sep 8, 2010
I've got a repeater bound to a datasource through the code behind. Everything is working fine so far except for this, I'm trying to concactenate a bound field as the id on a query string to an image handler:
<asp:Image ID="Image4" runat="server" BorderColor="#E5E5E5" BorderStyle="Solid" BorderWidth="1px"
Height="100px" Width="100px" ImageUrl="'~/ImageHandler4.ashx?Id=+'<%# Bind("ImageID")%>'"/>
What am I doing wrong?
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Feb 22, 2010
tell me what is the best way to add Delete and Edite to a repeater control using C# code.
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Feb 1, 2010
I have a ListView which I populate using DataTable.
In each row I have a delete button. When the user clicks on the delete, that particular row is deleted in the DataTable Table.
After I perform the delete, I want to avoid page reload just to populate the ListView with the new set of records without showing the deleted row.
I suppose LINQ is the best choice for this. But I am unable to implement it.
[Code]....
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Jul 1, 2010
I have this code:
[Code]....
And for the life of me I dont recall how to do an inline if when inside this repeater.
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Nov 1, 2010
How do i dynamically change the value of dataitem in repeater control(.net 2.0,VS 2005)..i have repeater something like this :
<asp:Repeater ID="rptGameInfo" runat=server OnItemDataBound="itemDataBound_rptGameInfo" >
<HeaderTemplate >
</HeaderTemplate>
<ItemTemplate >
<asp:Label ID="lblLoc" runat=server Text="Location:" ></asp:Label><%# Eval("GAME_LOCATION")%><br />
</ItemTemplate >
</asp:Repeater>
and it shows the result like this:
location:"Select"
If location is "Select" i want to change it to "n/a". So i am trying to capture it in itemDataBound even something like this
if ((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType == ListItemType.AlternatingItem))
{
DataRowView row = e.Item.DataItem as DataRowView;
string location = row["GAME_LOCATION"].ToString();
if (location == "Select")
{
// e.Item.Text = "n/a";>>
}
Does e.Item some 'text' sort of property ,i can set the value to?
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Jun 6, 2010
when I bind repeater control, I am getting an extra result when it render as HTML
eg:
<asp:Repeater id="rpPastHistory" runat="server">
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Jan 11, 2010
want to make something like facebook forward/invite UI with an auto-complete textbox and an invited list.
So how to add an item to a repeater?
I think one answer is to maintain a datatable and bind to the repeater, is there any other options?
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Mar 31, 2010
I am learning how to use repeater. I added two links to my repeater, a delete and an edit link. However, when I click either delete or edit link, they both take me to same method. How do I add the link such that when I click on edit, it take me to an edit method and delete takes me to a delete method. Below is a sample code.
Also, how do I delete a single row in a repeated. For example, I have a simple form that display an item description and a quantity. There are six item display on the form, but I wish to delete the third item. How can I pass in an id that will delete the third item rather than delete everything (i.e where item_id = 3)
[Code]....
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