Forms Data Controls :: Gridview Checkboxes Disappear And Don't Retain Viewstate?
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.
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Jan 25, 2011
i am creating dynamic textbox onRowCreated event in gridview control, however when i try to findcontrol i get null
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protected void gvORg_RowCreated(object sender, GridViewRowEventArgs e)
{
if ((e.Row.RowState == (DataControlRowState.Edit | DataControlRowState.Alternate)) || (e.Row.RowState == DataControlRowState.Edit))
{
if (e.Row.RowType == DataControlRowType.DataRow)
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txBox txtReg = new TextBox();.....
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Jan 19, 2010
I have a GridView in MultiView and everything works fine. When page load everything looks good,but then when i try to edit something in my gridview it does postback and the whole gridview disappear from the multiview.
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Dec 29, 2010
I have a gridview in which i have declared one static templatefield (with some button ctrls inside) in design itself.
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below is my code
[Code]....
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Sep 8, 2010
I already implemented the dynamic templatefield which will re-created in every postback. Everytime I make a postback in the page I see no problem but when I click my imagebutton inside the gridview then the dynamic templatefield disappear.
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Dec 15, 2010
I am having a gridview with dropdownlist and textbox controls.
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Jan 26, 2011
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[Code]....
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[Code]....
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Mar 12, 2010
[Code]....
I am trying to put the select command in code behind:
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Nov 2, 2010
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[Code]....
protected override void CreateChildControls()
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Jan 18, 2011
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May 11, 2010
[Code]....
I have a GridView attached to an ObjectDataSource (returning a DataTable) in a UserControl. The code is really simple. Data comes down fine when the page is first rendered. When I click on Select or Delete (inside TemplateFields), RowCommand is supposed to fire but it doesn't, the page goes straight to Page_Load. I literally have 0 other event handlers that are set on this control and everything else in the codebehind shouldn't even fire if it's a postback. Also on postback, the Select and Delete buttons disappear. It looks like the TemplateFields are still there but they're empty. The data fields (all of two columns) post back fine.
UC ASPX Code:
[Code]....
Code Behind:
[Code]....
containing UC:
[Code]....
And here is the code from the ObjectDataSource:
[Code]....
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Feb 9, 2011
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Dec 8, 2013
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Jun 7, 2010
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Feb 3, 2011
I have a gridview with scroll enabled. Means i have a gridview like this-
[Code]....
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Feb 2, 2011
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[Code]....
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Jul 14, 2010
have a gridview with a bunch of checkboxes. I would like to restrict the selection based on a value I get back from the database. I am able to do this on the serverside but it is very cluncky. Is there a way I could do that using javascript and ajax or just a more elegant way to approach this. The gridview is in a usercontrolMy code right now -
[Code]....
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Dec 3, 2010
I am running into a problem getting a value from my Grid View based on the selected checkbox. I have a grid view that is populated by database based on search criteria. However once that Grid View is populated, I would like to be able to select multiple ID's from that view. My coding experience isnt the greatest as I am still fairly new to all of this.
<asp:GridView ID="GridView1" runat="server" DataSourceID="ObjectDataSource1"
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Feb 16, 2011
I am trying to implement a gridview with some checkboxes to allow users to select the rows that they would like to insert into a file selected from a dropdown list. am working on being able to select the rows from the grid but not having much success. I can get it to recognise each selected row but when I place them in a dataset it only stores the last checked gridrow. It's probably something simple that I'm missing y code is
protected
void Insert_ButtonClick(object
sender, EventArgs e)
[code]...
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Jun 3, 2010
I hav a prob of checkboxes' checks not being registered...as explained below :
I have a gridview which is being populated using datasets.
[Code]....
I have added a column of checkboxes it using a TemplateField
[Code]....
And I am using a button to count the number of checked checkboxes.
[Code]....
I am viewing the value of session variable under at check.aspx
The Problem is that no matter how many checkboxes I check they are always counted as 0. The 'check' just doesnt get regsitered in the gridview.
After quite certain testing, a few things are clear
The checkboxes are being discovered by the counting loop fine.If I mark a cell as checked in the dataset before binding, then that check does get registered and thus is counted. Any thing I am missing ? Do i have to update something ?
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Mar 10, 2011
Im trying to input the value in the table into the checkboxes but i keep getting an error that states: "Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index"When i do a quick on this part of the code :"DirectCast(GridView1.Rows(i).FindControl("DescriptionA1"), Label).Text", i get "Run-time exception thrown". This is my first time trying something like that, i have search for solutions but now im more confused than ever.
[Code]....
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Jul 8, 2010
save the Mulitple checkboxes in Gridview in once. I want to save only those rows which are checked.. not the once which are not checked. There is a row in gridview which has four checkboxes in each row, so i want to save the row in which either or all of the checkboxes are checked and ignore the once in which anyof checkbox is not checked.
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Sep 14, 2013
I have a gridview based on two dropdown lists. The first list limits the values of the second dropdown list. On page load all available results are inserted into the gridview. After selection of the dropdown list, the gridview is refreshed with data limited to the two selections. This will result in 200 rows of available data. The user can select the page they want to go to using the page index.
They will then select the row to edit. Everything is fine up to here. Then the user will update the record with the appropriate data from the dropdown lists in the gridview or update the text box as necessary. They hit the update selection and the row is updated. The only problem is that they are brought back to the first page in the index. Since most of these people will be working through the list relatively in order, it would be nice if they could stay on the page they were working on rather than going back to the beginning every time. Is there a way to go back to the same pageindex they were at when they started the update?
I am including my code. I tried to use a variable for the pageindex as well as the selected values of the dropdown lists but I am quite sure I have applied them in the wrong places.
aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Trakker.aspx.cs" Inherits="AnnoTracker.WebForm1" %>
<!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 id="Head1" runat="server">
[Code] ....
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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
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