I have added one datalist into view state as:
ViewState["datalist"] = dtlstForm;
and retrieved it as:
DataList lis = (DataList)ViewState["datalist"];
then folowing error comes:
Type 'System.Web.UI.WebControls.DataList' in Assembly 'System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' is not marked as serializable.
Now here is the weird thing. First i am running it locally on the built in vs2008 web server.I load my control in fine, do a postback from a linkbutton, locally on my machine it all works fine, no issue.However when it goes onto my host, it falls over with the message:
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.Now i also load controls dynamically and use postbacks and things in the admin area of the site...and that works fine, however my front end just keeps failing? See the code behing below:
[Code]....
I have problem getting values from viewstate in GetTopThemes.
<asp:ObjectDataSource
ID="sourceGetTopThemes"
runat="server"
TypeName="DBConnection"
SelectMethod="GetTopThemes"
EnableViewState="true"></asp:ObjectDataSource>
[Code]....
}
[Code]....
when the page is not Posted back, I saved all values in the viewstate.
I have been getting this error a lot lately with some of my users, and I had a couple of concerns with view state and I have read so many articles but I am still lost..
1. I use masterpage on all the pages and I need viewstate for some of the pages but..
There is a page where a user will fill out the information and then submit this data to a cgi server, and it is where I get most of the Client Disconnected errors, what would happen if I disable viewstate when they click on that button?
Now when a user browses from one page to another, does the view state from the previous page get deleted? If not how would I delete it?
Does the master page have its own viewstate? Would I be able to make sure none of items on my master page are using the viewstate?
I have a shopping cart page (Cart.aspx) that has a button that will (sometimes) post to a third party payment gateway, if payment is necessary. The payment gateway will process the payment and then do a silent post to my website (Order.aspx) so I can update the order status.
Order.aspx always throws an invalid viewstate error, even though viewstate is disabled on the page.
What's happening is that Cart.aspx (which has viewstate enabled) posts to the payment gateway, and the gateway will post it back as part of the silent post. Even though Order.aspx has viewstate disabled and validation disabled, it still tries to validate the __viewstate field it's being given.
I know setting EnableViewState=false will disable the rendering of the __viewstate field, but if another page provides the field, shouldn't it still skip validation? I tried calling ViewState.Clear() on the Page_Init event of Order.aspx, but ViewState is apparently empty. how to get around this? I don't want to disable ViewState on Cart.aspx (in some cases it may be necessary), but I can't figure out how to clear it on Order.aspx.
In Datalist Item Template Another Datalist And Child Datalist How can we access link button inside chile datalist when click in child link button
View 1 RepliesHere is my code through which i can generate dynamically 2 checkbox group
DataTable dt = new DataTable();
DataList1.DataSource = dt;
DataList1.DataBind();
DataList2.DataSource = dt;
DataList2.DataBind();
Design Page
[code]....
There is two checkbox group which have same datasource, so in both case same checkbox are showing and also same event is firing for both. Here is the event code
protected void CheckBox_CheckedChanged(object sender, EventArgs e)
{
string OpService = ((CheckBox)sender).Text;
}
Now what i want to do is, while check one checkbox from the 1st checkbox group the same checkbox should be selected from the second checkbox group automatically, also if i deselect one checkbox that should be deselect from both checkbox group.
Am building a Form for out intranet that runs on ASP.NET and C#, it is to be a survey from a SQL database. I have the connections setup can pull informations/Questions from the database. I am having a problem with setting up radio buttons within a datalist, ive never done this and i know they require unque names.
It is to be 4 radio buttons per question where only one can be select, i know how to group just not via a datalist with unique names
How can I do paging with datalist if that datalist is populated with inputs coming from a querystring?
View 3 RepliesI have following datalist ,to display employee id, name, email ..... datalist have column with link button text " Get Details" and fontcolor "black" , onmouseover of the particular row i want change the color of linkbutton or the image of linkbutton ..
<asp:DataList ID="DataList1" runat="server" BorderWidth="1px" CellPadding="1"DataKeyField="EMPID"
GridLines="Both" RepeatColumns="4" RepeatDirection="Horizontal"><ItemTemplate><table border="0" id="thistable" runat="server" style="width:100%;height:100%"> <tr> <td> EMPID:
<asp:Label ID="EMPIDLabel" runat="server" Text='<%# Eval("EMPID") %>'>
[code]...
How To get Datalist Checkbox Select Item To The Another Datalist on click CheckBox
Code Like
<form id="form1" runat="server">
<div>
<h2 style="background-color: #CCC; font-size: 16px; font-family: Arial, Helvetica, sans-serif; font-weight: 400;" class="heading">Brand</h2>
<asp:DataList ID="DataList5" runat="server" Style="font-weight: 700; color: #CC33FF; background-color: #66FFCC;" Height="100px" Width="122px">
<ItemTemplate>
[code]....
I need to find which Selected Key value that was selected in the ChildDatalist inside the MainDatalist
this is my Html code...for the MainDataList and the nested Childdatalist
[Code]....
I am trying to place a datalist inside datalist. I managed to place a datalist inside gridview but not datalist inside datalist.
Below is the code I am using to bind the datalist into the master gridview, I am trying to change this code in such way it will be right for datalist inside datalist but so far I did not succeed.
[Code]....
i have a datalist . that is contains 7 columns in repeat layout .when i have more from 7 columns , datalist style is normal .but when i have smaller than 7 columns ! data list style is not normal,
because there are some empty columns without specific schema.
How i can make a datalist > when i have 1 columns in my datalist my first layout width be 100% ;
and dont show some empty layout ?
I have following code
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="GuestBookPage.aspx.cs" Inherits="GuestBook.GuestBookPage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
[code]....
I wanted to get label control when button is clicked i.e button1
how do I use the datalist "DL_Pro_Result" to find the child datalist "DL_Gro_Result" in C#?
For example in the following code, dlii value is null, even though dli != null.
DataList dli = (DataList)Page.FindControl("DL_Pro_Result");
DataList dlii = (DataList)dli.FindControl("DL_Gro_Result");
<div id="ProList">
<asp:DataList ID="DL_Pro_Result" runat="server">
<HeaderTemplate>
<table id="T_Pro_Result_Header" runat="server">
<tr>
<td>
<asp:Label ID="L_Pro_Result_Header" runat="server"></asp:Label>
</td>
</tr>
</table>
</HeaderTemplate>
<ItemTemplate>
<table id="T_Pro_Result_Item" class="table" runat="server">
<tr>
<td>
<asp:Label ID="L_Pro_Result_Item" runat="server"></asp:Label>
<asp:Button ID="B_Pro_Result_Item_1" OnClick="B_Pro_Result_Item_1_Click"/>
</td>
</tr>
<tr>
<td>
<asp:DataList ID="DL_Gro_Result" runat="server">
We have a Datalist in which we have some data, with every Item we have a button control, What i want to achieve is that on the button click, the data related to that particluar row of Datalist is fetched whose Button control is clicked. How to accomplish this, The problem is how to attach the button control with values related in that partucular row, Note that I am using ArrayList as the Datasource since I am enabling pading via pageDataSource class...
View 1 RepliesThe problem is that i have a search page. Access Database holding the information. I have a Access Datasource on the page with a Datalist to show the data. I need to find a way on setting it up to says "Sorry no results found" when the is no results. i am unsure on how to do this though.
Below is my datasource and datalist
[Code]....
i used a datalist within datalist i placed a panel and in the panel i placed a placeholder then a table in it .i placed the lables, textbox and checkboxes in the table from backcode that is in c# codei tried to find the control(Table) in datalist and also in placeholder but it shows null what is the reasonit gives the exception as in the subjectthe table name and reference names are same as i declared
Table tbl = (Table)pnlMentalStatusExam.FindControl("tbl");
Table tbl = (Table)phMentalStatusExam.FindControl("tbl");
tbl is same as i declared in the table creation
pls solve my problem
Table tbl = (Table)pnlMentalStatusExam.FindControl("tbl");
Table tbl = (Table)phMentalStatusExam.FindControl("tbl");
I have an aspx page that I want to convert to an HttpHandler, but I'm struggling withewState that's been used in the code behind of the aspx page
View 2 RepliesUpon page reloads I want to retain the values the user had typed in upon hitting submit. I worry about viewstates being cumbersome for pages, both in bandwidth and in time for a page viewer to download the page. I am cheap with my bytes :p
My question is instead of using server controls and such I am having the form on the page do a get to itself and on the aspx putting <input type="text" id="user_email" name="email" value="<%=Request.Form["email"] %>" /> This allows me to not use viewstate. Are there any potential shortcomings to doing things this way? My goal is always for a lighter page and efficiency even if it is more work.
I am using a enum
public enum WatchUsageMode
{
Watch = 1,
EmailPreferences = 2
}
i want to set the property of that enum in my view state in such a way that whenever view state is null return Watch else EmailPreference.how can i get and set the property?
i am new at the ViewState and i am looking to see what values are stored within it. I know how to loop through an array to check for a value but i do not know how to go about doing that for a ViewState("test") property.Let's say i have added "bob, tom, Jim" to a ViewState called ViewState("test"). I would like to be able to see if "tom" was in the ViewState("test"). If not then add it but if it exists already then skip it.
Public strIDArray() As String
Public vsSaver As String
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
[code]...
If EnableViewStateMAC is set to true, ASP.NET will generate a hashcode for the ViewState data and compare it to the hashcode stored in the posted value. What prevents an attacker from setting the hash based on the altered form values?
View 1 Replieswell what i want to find out is how can i figure out if some change occurd in page when postback , i mean when the first state of the page hahe any changes after postback . I thought maybe somehow to compare viewstaes but i can not find out how can i do that.
View 13 Replies