Web Forms :: Different Control Is Assigned To The Same ID After Postback
Jan 11, 2010Is there any solution for this issue.
http://forums.asp.net/t/1006536.aspx
Similar Messages:
Web Forms :: Error - Control Can't Locate Or Assigned To Same Id
Dec 20, 2010I am stuck with a problem. I have a product page which consits of 2 content place holders. in one of them there is gridview bounded with produtcs and in the other there will be dynamically generated checkboxes used to filter the grid view. upon clicking a checkbox the gridview is filtered showing the products that match the checkbox criteria AND the checkboxes must also be filtered so that checkboxes which were available for previous products should be deleted.
I am loading the checkboxes in the page load. When I enable viewstate for the checkboxes I get the following error:
Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
when I disable the viewstate of the checkboxes I get the following error:
An error has occurred because a control with id 'ctl00$refineProducts$ctl04' could not be located or a different control is assigned to the same ID after postback. If the ID is not assigned, explicitly set the ID property of controls that raise postback events to avoid this error.
Code for my page_load event:
[Code]....
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System.InvalidCastException was unhandled by user code
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StackTrace:
at ASP.entries_aspx.__DataBinding__control44(Object sender, EventArgs e) in c:inetpubwwwrootMediaLibraryEntries.aspx:line 103
at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding)
at System.Web.UI.Control.DataBindChildren()
I am convinced that the problem is the null values in the DateTime column of the table. I've done some web searches on this, and some have suggested placing some dummy values into that column, but that seems more like a kludge, rather than a solution. How do I keep nulls in the table, and yet not have that preceeding error come up when a user tries to edit the selected record?
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understand by looking at the code that AlerId is getting assigned to ObjectRecordID
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Type type = Type.GetType(strFullName);
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ctrlTemp.Text???
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[Code]....
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protected void Page_Init(object sender, EventArgs e)
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Web Forms :: Public Variable Is Not Saving The Value Assigned?
Jul 18, 2010[Code]....
I have a publice variable to be used in the same webpage. when the user click on button 1, it does some process and assign a value to my public variable. After that, the user can click on button 2 which needs the public variable value to function. However I see the value of the public variable is 0 when I click on button 2.
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[Code]....
Web Forms :: Dynamic Image Button Not Firing When Id Assigned
Mar 3, 2010I am having an odd situation with a dynamic image button. This button is part of a dynamically built asp table which lives in a repeater. Not sure if that complicates things or not, but here's the issue. Since the buttons are dynamically built, if I let asp.net handle the ids I get a crash on postback. Not entirely sure why, but If I set the id in code, I don't get the duplicate id error but I don't get the event fired either. Here is the code building the button:
[Code]....
With this code the IB_Validate_Click never fires. If I comment out the IB_Validate.ID line, the event fires. But, as mentioned above, I have an id clash on a postback. Any ideas why the IB_Validate_Click doesn't fire on this button if the id is set?
Web Forms :: Lost Child Control After Postback In Panel Control
Nov 1, 2010I had a little project is create dynamic control. My project had get detail of content and replace in sign string, Add control in sign. After click button I will find in control, I had added on page load in panel. I can't get value in child control panel, Don't have control in panel. My source is
protected void Page_Load(object sender, EventArgs e)
{
string config_design = GetConfigueKey(configDesign);
Genform(config_design, GetContent(config_design));
if (IsPostBack)
{
btn_submit_click(sender, e);
}
else
{
string config_design = GetConfigueKey(configDesign);
Genform(config_design, GetContent(config_design));
}
}
protected String GetContent(string designname)
{
string rev = "";
mClsDB = new clsConn();
strSql = "SELECT STR_DESIGN_CONTENT,STR_DESIGN_NAME,INT_FORM_ID FROM TBL_DESIGN WHERE INT_DESIGN_ID = " + designname + " ";
DataTable dt = mClsDB.GetDataTable(strSql);
if (dt != null)
{
if (dt.Rows.Count > 0)
{
rev = dt.Rows[0]["STR_DESIGN_CONTENT"].ToString();
}
}
return rev;
}
protected void Genform(string designname, string content)
{
string rev = content;
mClsDB = new clsConn();
//strSQL = " SELECT INT_FIELD_ID,STR_FIELD_NAME,STR_FIELD_SIZE,STR_FIELD_CSS,STR_FIELD_DEFAULTVALUE,BIT_FIELD_VISIBLE,INT_FIELD_VALIDATE_TYPE,STR_FIELD_MINMAX,STR_FIELD_TYPE_NAME ";..................
Forms Data Controls :: Is It Possible To Have Error Invalid Column Name 'assigned' In These Circumstances
Jun 25, 2010For example:
[Code]....
When I run this the error is 'Invalid column name 'assigned'.'Yet if I load up Microsoft sql server management studio and run the query against the same db:
[Code]....
I get the data I was expecting and the column does exist?
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Sep 12, 2010I have some dropdown list boxes that I need to fill with data from a database but I also need the first option to be "Show All"... So I need to combine using a datasource and manually adding an item to the top of the list. I have tried two different ways with no luck:
1. with the appendDataboundItems = true, on aspx page, and below code in codebehind:
//lstClass.Items.Clear();
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good example of the listview manual sort logic?
Get Source Of Postback Which Control Causes The Postback?
Feb 10, 2010if (Page.IsPostBack)
{
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}
Web Forms :: Clicking Radio Button In Web Control Causes All Other Web Control Radio Buttons To Fire Postback?
Feb 8, 2010I have a web application that shows a page containing between 6 and 20 AJAX UpdatePanels, contained with Custom Web (.ascx) Controls.
You can see an example of such a page here:
[URL]
The problem I'm getting is that when the user FIRST clicks any of the radio-buttons on any of the controls in the page, ALL the radio buttons that have an active selection ALSO fire an rb_CheckChanged event (see application log below). On subsequent radio-button
clicks, only that RB fires the event (as expected).
This behaviour is having a dramatic impact on performance. The page loads quickly, and a "normal" RB click provides an AJAX update correctly within 1 second. The problematic first RB click, however, takes up to SIX seconds to process, which is unacceptable from a user experience standpoint.
Developed in VS.NET 2008, ASP.NET 3.5. Also I converted the "Web Site" solution to a "Web Application" (pre-compiled) and got the same performance (still too slow). Release builds run only marginally faster than debug builds.
Why would a single RB selection change cause all RB's that have a "selection" set on them to also fire? (The "selection" is determined through database settings every time the control is populated, which is called from within the parent page control's Page_Load function. This selection is determined also at first page load, since all the controls get populated then, so why would the clicking of an RB cause them all to fire an event, and only once? That's what I don't get...)
Not sure if this is an AJAX issue, or general ASP.NET UI issue, so I'm posting in two forums on this one.
Array Returns 0 Instead Of Assigned Value?
Aug 18, 2010I assigned a int value to to one of the cells in an array and then output that value to a label. The label correctly displays that value however when I try to get that value later in a different method the cell returns a 0. I think that the problem is that I shouldn't of made the array on the outside of a method; I checked the code that deals with the array about 3 times and it all seems fine. how I should create, get, and set this array. I was setting the value of the cell like this
arrayForXps[0,1] =Convert.ToInt32(ddl_att_desLvl.SelectedValue); //This value is never zero.
I was getting the value like this Label.Text = Convert.ToString(arrayForXps[0,1]);
[Code]....
Variable Nuid Is Used Before Being Assigned A Value
Mar 7, 2016I am trying to access a user's login credentials to find out if they are an admin user or not. This way I can assign session variables to them and show certain aspects of the web page that other users won't see. I unfortunately keep getting this error when trying to dim a variable to assign the values too.
Variable Nuid is used before being assigned a value.
Variable AdminUser is used before being assigned a value.
Code:
Protected Sub checkAdmin_Click(sender As Object, e As EventArgs) Handles checkAdmin.Click
Dim strNuid As String = Request.Form("Nuid")
Dim cnString As String = ConfigurationManager.ConnectionStrings("snfTimeSystemConnectionString").ToString()
Try
Using cn As SqlConnection = New SqlConnection()
cn.ConnectionString = cnString
[Code] .....
VS 2015 - Variable Is Used Before It Has Been Assigned A Value
Apr 20, 2016I was working on my homework, making a website obiously, but I have a small problem with the griedview. I wanted to add a button on the end of the row, but I receive some error notifications and warnings too...
Code:
Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.UI.WebControls
Partial Class Search
Inherits System.Web.UI.Page
[Code] ....
There is this error too:
SeverityCodeDescriptionProjectFileLineSuppression State
ErrorBC30518Overload resolution failed because no accessible 'Add' can be called with these arguments:
'Public Overloads Sub Add(column As DataColumn)': Value of type 'ButtonField' cannot be converted to 'DataColumn'.
'Public Overloads Function Add(columnName As String) As DataColumn': Value of type 'ButtonField' cannot be converted to 'String'.GIPH:GIPSearch.aspx.vb31Active
Web Forms :: Unable To Control Postback?
Apr 23, 2010I have a tab which loads a usercontrol dynamically and this usercontrol has 2 other usercontrols. One on the left loading treeviewA and one on the right treeviewB.I am using update panel for aspx and the ascx too. But, I am not able to control to page state and moreover when I click on one control, it get its child item, by the time I click on other control, it would refresh other control too and will lose its value.I am using below code in aspx and I have embeded update panels in usercontrols too
using http://msmvps.com/blogs/luisabreu/archive/2006/11/16/adding-removing-updatepanels-dynamicaly-from-a-page.aspx
as reference
<asp:ScriptManager
ID="ScriptManager1"
runat="server"/>
[Code]....
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