Gridview - Can Explicitly Force To Re-load The ViewState Data Of Any Data-contro
Jun 30, 2010
I have a problem regarding to asp.net lifecylce hierarchy.
Basically, I have one user control which has a GridView in it. And this GridView is dynamically generated based on a public property on the control (named Parameter in the simplified code below).
Everything is fine when I insert this control in an aspx page, set its Parameter property and call DataBind(Parameter) on it. GridView is generated and populated on the UI.
Problem occurs when I post-back the page. I have to regenerate the GridView structure so that the data in the ViewState of the control can be used to populate the GridView. So that I can achieve its content. But as long as the GridView structure is generated dynamically and it is based on the Parameter property set on it, this is not possible. Because the OnInit of the user control is called before the OnInit of the page and that is why the Parameter property is set after the generation of the GridView structure. As a result I get an empty Gridview in the end.
Here is the code in a simplified way.
Can you give me some recommendation how to overcome this?
Can I explicitly force asp.NET to re-load the ViewState of a gridview?
[code]....
View 1 Replies
Similar Messages:
Mar 27, 2011
I have a C# assembly that loads external files. This assembly is used by asp.net website. The following is the code that loads the data files
string dataDirectory = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location),"data"); filePath = Path.Combine(dataDirectory,_fileName);
The component works fine in a windows app, but when I tried to use it in an asp.net website, it fails as the site could not find the data files. And it gives me the following error:
C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Filescmictranslatorsite20a8eddd864b2575assemblydl35bd4a35e8c6f79b6_98eccb01datafile.txt
View 1 Replies
Apr 5, 2010
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.
The above error occurs with gridview control , when used with template field columns with item template / and edit templates etc.
updating a row within gridview, at the time of loadiong it loads perfectly fined, but when tried to modify an existing row within gridview control, then it produces the error. Make sure the grid view control has to be a child control which manages the child table info with in a master form. to reproduce the above problem the grid view must be loading the child records info of a master within the masterform, meaning both master data and gridview data all to be managed in one single form.
I had to replace gridview control with datagrid and then it worked perfectly fine. I wasted almost 4 days of my time., there is no way we could figure out the problem. here is the full info of the problem.
Server Error in '/' Application.
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.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: 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.
Source Error:
[Code]....
Stack Trace:
[HttpException (0x80004005): 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.] System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +306 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Page.LoadAllState() +312 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661
Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082
View 2 Replies
Mar 2, 2010
I'm developing a custom webcontrol from GridView.
I've run into this bizarre situation wherein I get the below error if I set page size other than 5 in the page using this control.
"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."
This GridView is a hierarchial type. I add a new GridView below each row in the webcontrol overriding OnRowDataBound.
If I set pagesize as 5 the paging works properly.
View 2 Replies
Apr 22, 2010
I have gridview control. visit [URL] but when i change page index of this i get error 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.
View 4 Replies
Jun 12, 2010
I have a FormView and a GridView connected to the same datasource inside of a MultiView where one view is for the grid and the other for the form. The GridView has selection enabled and when the user selects a record in the GridView I make sure that the same record is selected in the FormView.mv.ActiveViewIndex = vIndexForm; // causes the MultiView to change views from the grid to the form
fv.PageIndex = gv.SelectedIndex + (gv.PageIndex * gv.PageSize); // causes the FormView to use the same selected record as the GridView
This should cause a PageIndexChanged event (it doesn't), so I called by event handler explicitly. In the event handler I change the mode to FormViewMode.Edit. This should cause a ModeChanged event (again it doesn't), so again I called it explicitly.Finally in the ModeChanged event I get the DataItem for the FormView so that I can update some special fields that require some special formatting, however fv.DataItem is null which means I can't do any special formatting. At this point the FormView shows and the regular fields are fine. If I now hit the Cancel button the FormView fires the ChangedMode event at which point I changed the MultiView's ActiveViewIndex back to the view with the grid. The grid displayes just fine, but if I do a select of a row within the GridView again I get the "Failed to load viewstate" error.I can only assume that I'm either doing something in the wrong order or at the wrong time and it's tripping me up.
View 4 Replies
Nov 17, 2010
I have some doubt about GridView PageSize, for the example if my table have more than 100000 rows and i set PageSize=50, i can see GridView trying to download whole 100000 rows and display only 50 records with pagewise.
In this case my application getting very slow.
Is there anyway to force GridView download data according to the pagesiz without passing limit in sql?
I have some doubt about GridView PageSize, for the example if my table have more than 100000 rows and i set PageSize=50, i can see GridView trying to download whole 100000 rows and display only 50 records with pagewise.
View 5 Replies
Oct 9, 2010
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]....
View 1 Replies
May 4, 2010
I have a FormView with an EditTemplate.And the EditTemplate contains an ascx control:
<asp:FormView
ID="fvTicketUpdate"
runat="server"
[code]...
The contents of the ascx control has TextBox and DropDownList controls binding to the results of the FormView's ObjectDataSource through Text='<%# Eval("field1") %>'and SelectedValue='<%# Eval("field2") %>'.This works fine and I have been building all of my front end pieces like this as <asp:Panels> rendering as FieldSets that go 100% across the screen.And we call these areas "strips" accross the screen.But now I've run into a problem.One TextBox and one DropDown bind fine to a Ticket Object.But the DropDownList that works has its <asp:ListItems> hardcoded before hand.Now I have DropDownList that gets populated through a WebService in the ascx's
code behind like this:
public partial class UserControls_FormControls_PntipUpdtFaaInfo :
System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
[code]...
The Problem I think is the FormView is trying to do its Bind to the objectDataSource before its child ascx control is loaded in the Edit Template.And I am getting this error:
Databinding methods such as Eval(),XPath(),and Bind() can only be used in the context of a databound control.Meaning that the control must already be databound to bind the selectedValue to a Property of the TicketObject.Is there an easy way to force the order of loading to make the PntipUpdtFaaInfo control load and have its Page_Load execute and bind ddlEquip before the FormView does its first dataBind and executing its Evals?Otherwise I have to take out the eval on the ddlEquip SelectedValue attribute and go to the Parent Page and hack and force everything to happen when it needs to.This layout has worked out well for me.All of the ascx area strips across the screen share the same Validation Summary for example.It allows me to think about one section at a time and the Properties to the Business Obect and CRUD methods as I go.But this is a big brick wall I've hit.
View 1 Replies
Dec 13, 2010
one of my stored procedure has 4 select statments and gets data from large tables,
can i explicitly store result of stored procedure into buffer cache?,
and when calling stored procedure, than returns data from buffer cache?
View 2 Replies
Jan 7, 2014
how to insert data in DB table from view state gridview ?
protected void Page_Load(object sender, EventArgs e)
       {
           if (!this.IsPostBack)
           {
               this.GetMaxId();
               this.GetPersons();
       Â
[code]...
View 1 Replies
Dec 21, 2010
Consider I have 2 controls, C and CompositeC which contains C. Both C and CompositeC have ViewState.
Now consider a third control causes a postback.
The resulting life cycle will be as follow:
CompositeC tries to restore state. To do so it needs to create the child controls, so it creates C.
When C is created it's ViewState is restored.The third control's postback event is triggered. At this time a handler calls CompositeC.RecreatedChildControls() and C is created again.Everything renders.
The problem is that C state is not restored again after step 3. RecreateChildControls method should modify the control's state so that when C is reintroduced to the CompositeC control's collection it's viewstate is automatically restored but it doesn't.
View 1 Replies
Jul 19, 2010
I have an ASP.Net site that has master pages. The master page has some calls to functions to get information from a database. Then in one of the parts of the master page I have form that modifies that information. So when the user clicks a button the information in the database is updated but the display of that information doesn't update until the page is refreshed or another link is followed.
I would like to know how to force a page to refresh without loosing VIEWSTATE information so that the newly updated data in the database will appear correctly on the screen.
View 7 Replies
Jul 2, 2010
I have a gridview control on my page allow paging set to true and page size to 10 , i have an external button to select a particular row and move on to consecutive rows , How is that to move on to the next page when the row selection reaches end of the existing page i'e force gridview to perform Page index change externally without clicking on a pager of GridView .
View 1 Replies
Aug 6, 2012
I want to do one thing that when i edit the gridview then it will not go back to main form for editing.it will remain there in the form for the row editable.
i-e when i edit any row then it will be editable on the gridview.
<asp:GridView ID="noticeDetails" runat="server" BorderWidth="1px" AutoGenerateColumns="false" PageSize="10" Width="10%" CellPadding="10"
AllowSorting="true" AllowPaging="true" AutoGenerateEditButton="true" onrowediting="noticeDetails_RowEditing"
onrowcancelingediting="noticeDetails_Rowcancelingediting"
[CODE] ...
View 1 Replies
Jul 17, 2015
<asp:TemplateField HeaderText="" meta:resourcekey="PStartTime" ItemStyle-CssClass="cssItemStyle" HeaderStyle-CssClass="cssItemStyle">
  <ItemTemplate>
     <asp:Label ID="lblPStartTime" runat="server" Text='<%#Eval("PStartTime")%>'></asp:Label>
  </ItemTemplate>
  <ItemStyle Width="25%" Height="30px" HorizontalAlign="left" />
</asp:TemplateField>
I am showing the pages in English and Arabic using Local Resources in my website. I want to show Gregorian date time in Gridview  in both English and Arabic Pages(ar-SA). How I will do it,
View 1 Replies
Mar 31, 2011
i bind a DataTable to a gridview.i want to use the DataTable in some postback event, and ii want to use viewstate.
does gridview save data in viewstate? if no what is the best way to do this.
(full story :i have a custom gridview derived from standard asp.net gridview, and i put a button in header to export data to excel, i want to use data saved in viewstate to export to excel)
View 2 Replies
Mar 6, 2010
when updating a decimal field in a GridView all is fine when using e.g. "2.3" ("." to separate the fraction!)
However, when using "2,3" I get e formatstring exception!
I tried "regularExpressionValidator/RequiredFieldvalidator" but did not succeed! Tried also with FormatString like {0:n}.....
Questions:
is this controllable by "Culture / UICulture" in web.config (played with it without success!
How do I best check for correct input i.e. force "." as separator
Can I use the "DataFormatString" property for the appropriate GridView field (like {0:n}) ......
[code]....
View 1 Replies
Jan 31, 2011
I'm trying to add a row grouping row to my data-bound gridview. It works fine on the first response, but at the postback i got the "Failed to load viewstate" error.There is the code for the GridView's RowDataBound event:
Private Sub AddGroupingRow(ByRef eRow As GridViewRow, ByVal Css As String, ByVal ColSpan As Integer, ByVal Txt As String)
Dim cell As New TableCell()
cell.ColumnSpan = ColSpan
cell.CssClass = "Spacing FieldCell"
cell.Text = Txt
Dim row As New GridViewRow(-1, -1, DataControlRowType.DataRow, DataControlRowState.Normal)
row.CssClass = Css
row.Cells.Add(cell)
[code]...
View 2 Replies
Apr 8, 2010
I've got a GridView on my page which has some bound controls, one of which is a label (to display total price):
[Code]....
However this value is not being passed to my page. All I see is '£' symbol, no price which makes me think Viewstate["youpay"] is empty? I have enabled viewstate on the Page and Control tags.
View 3 Replies
Apr 22, 2010
I am creating a gridview dynamically in a custom control and adding it to a Panel. I set the EnableViewState = true. The problem is that on a page postback the GridView does not seem to retain its values. If I add a GridView through the UI then the viewstate is preserved. The problem seems to occur when it is put dynamically only.
View 2 Replies
Sep 20, 2015
ViewState["Index"] = reader[0].ToString();
Using sqlDataAdapter, I wanna save one column to view state like this.
View 1 Replies
Jan 5, 2014
how to write a code to check the Transaction ID from SQL Table in view state gridview for each row data ?
For Example, select transID from Table.Current ID is 14481.Â
So now when i add in the view state grid view, it show the same trans number
Is it any method to write the + values in add row function in c# to increase the values ? as below is the c# code. Â
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
[Code].....
View 1 Replies
Mar 21, 2011
I have a checkbox column in a Gridview that is added in the aspx and the other columns are added in the code behind. The checkbox is a choice to print the record or not. When the print button is pushed the page posts back and the checkboxes are gone.
I have read that you have to re-add the checkboxes on postback, but where do you do that and how do you retain the viewstate values - checked/not checked? I have tried everywhere - PreInit, PreLoad, PreRender... I can't get the viewstate values to appear anywhere. The checkboxes can be added just about anywhere but the vaules are set to "unchecked" by default... no values ever come back no matter where I re-add them.
View 7 Replies
Mar 21, 2011
I have a 3 text boxes. When i enter datas in and click the button it displays the gridview with filtered data. Now my problem is if there is no data in gridview it has to show "no data" so I used emptydatatext property.. The problem is, in the page load itself it shows "no data"
View 3 Replies
