Get An Error While Editing Gridview?
Jul 21, 2010
I have a gridview with edit and delete. When i click Edit, I donot get all the textboxes. I just get 1. on top of that, when I try to update anything in that textbox, I get object Reference not set to an instance of object. my aspx for gridview is:
<asp:GridView ID="grdItems" runat="server" AllowSorting="True"
BackColor="White" BorderColor="Black" BorderStyle="Solid" BorderWidth="1px"
CellPadding="4" ForeColor="Black" GridLines="Vertical" width="670px" OnRowCancelingEdit="grdItems_RowCancelingEdit" OnRowEditing="grdItems_RowEditing" OnRowUpdating="grdItems_RowUpdating" DataKeyNames="rowid" AutoGenerateColumns="False" OnRowDeleting="grdItems_RowDeleting" Font-Size="Smaller" ShowFooter="True" OnRowCreated="grdItems_RowCreated">
<Columns>
<asp:TemplateField HeaderText="ROWID" SortExpression="rowid" Visible="False">
[code]...
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Oct 14, 2010
I had gridview which retrieve Products from database by sqldatasource1 ,and my manager asked me to filter this gridview by DDL to filter gridview with specfic Model ,I add some function on gridview as edit,paging .I did my code well and gridview filtred by the Model_Id which come from DDL .But when I tried to edit any product or navigate through paging I faced this error (The GridView 'GridView1' fired event PageIndexChanging which wasn't handled. )when paging ,And this for editing (The GridView 'GridView1' fired event RowEditing which wasn't handled.)
protected void Page_Load(object sender, EventArgs e)
BindGridFunction();
[code]...
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Dec 9, 2010
I have editing enabled gridview. I m basically calculating many columns in rowdatabound event of gridview. For this i m using templatefields with labels control inside them.
Here is my c# code-
[Code]....
It doesnot cause any problem. But when i tried editing and click on edit button of my grid. It throws error in rowdatabound event's second line starting with decimal rejp.
Message- Object reference not set to an instance of an object.
Am i missing something or should i have to use any other event to handel editing in this case.
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Feb 20, 2011
I am trying to edit and update a selected users details, following the tutorial [URL]
I get the following errors in the Error List in VS 2010:
Error 6 'Comment' is not a member of 'System.Security.Principal.IPrincipal'. C:projectsFPOS_v2FamilyAdminedit_user.aspx.vb 21 9 C:projectsFPOS_v2
Error 5 'Email' is not a member of 'System.Security.Principal.IPrincipal'. C:projectsFPOS_v2FamilyAdminedit_user.aspx.vb 20 9 C:projectsFPOS_v2
Error 2 'FamilyAdmin_edit_user.Private Sub DeleteUser(sender As Object, e As System.EventArgs)' is not accessible in this context because it is 'Private'. C:projectsFPOS_v2FamilyAdminedit_user.aspx 140
Error 1 'FamilyAdmin_edit_user.Private Sub UnlockUser(sender As Object, e As System.EventArgs)' is not accessible in this context because it is 'Private'. C:projectsFPOS_v2FamilyAdminedit_user.aspx 138
Error 7 'IsApproved' is not a member of 'System.Security.Principal.IPrincipal'. C:projectsFPOS_v2FamilyAdminedit_user.aspx.vb 22 9 C:projectsFPOS_v2
Error 8 'UnlockUser' is not a member of 'System.Security.Principal.IPrincipal'. C:projectsFPOS_v2FamilyAdminedit_user.aspx.vb 88 9 C:projectsFPOS_v2
Error 4 Property 'User' is 'ReadOnly'. C:projectsFPOS_v2FamilyAdminedit_user.aspx.vb 11 9 C:projectsFPOS_v2
The code for the edit_user.aspx is:
[Code]....
The code for the edit_user.aspx.vb is which is where I am getting the error:
[Code]....
The problem is with the User. But I don't know how to sort this as im new to all this.
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Feb 22, 2010
ASP.NET - C# (C Sharp) - SQL Server
I've got a master table and a child table. The master table has a nullable column called ReferenceID and in some cases it should be NULL, but when it's null in a record, I get an error while going to Edit mode of DetailsView.
DB Tables:
MasterTable [Columns: MasterTableID (PK), Name, ReferenceID (FK)(Nullable)]
ReferenceTable [Columns: ReferenceID (PK), Reference]
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False">
<Fields>
<asp:BoundField DataField="MasterTableID" HeaderText="MasterTableID"/>
<asp:BoundField DataField="Name" HeaderText="Name"/>
<asp:TemplateField HeaderText="Reference" SortExpression="Reference">
<EditItemTemplate>
<asp:DropDownList ID="DropDownList_Reference" runat="server"
DataSourceID="ObjectDataSource_ReferenceTable" DataTextField="Reference"
DataValueField="ReferenceID" SelectedValue='<%# Bind("ReferenceID") %>'>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="LabelReference" runat="server"
Text='<%# Bind("Reference") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
</Fields>
</asp:DetailsView>
Select Queries:
Select MasterTable.*, ReferenceTable.Reference
From MasterTable INNER JOIN
ReferenceTable ON MasterTable.ReferenceID = ReferenceTable.ReferenceID
Select * from ReferenceTable
In Read Only mode all everything is OK, but when I click on Edit and Postback happens, I get the following error: Server Error in '/Sample' Application. 'DropDownList_Reference ' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value It means that in MasterTable, the ReferenceID shouldn't be NULL, but it should be in some cases.
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Jan 3, 2010
I have a nested gridview dynamically added. It seems I resolved all issues with the loading this control on a parent page along with other controls and I can trigger the edit of the first level - the master part of the gridview. However, I cannot trigger the edit on a child gridview.
OnRowEditing="grdChildGridEdit_RowEditing"
The master and the child gridviews have objectdatasources in a markup but I have to do the additional data binding after the loading the control on the parent page (see the code below). I'm doing that additional data binding only for the master gridview that is working fine and shows the data for the master and the child gridviews. When I click the Edit button on the master gridview it shows text boxes for the editing but when I click the Edit button on the child gridview it's doing nothing and moreover the editing mode for the master gridview is going back to the initial stage (labels).
I was trying to trigger it throughuse the registering the event:
[code]....
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Mar 23, 2010
I have a two text boxes named region id and region name..and a button control
I enter some values into those text boxes and click the button to insert those values into the "gridview"and a "data table" associated with the gridview.
The gridview has the "enable editing" set to true..but when i click the "edit" button of a particular row in a gridview i get no response...i.e i do not get editable textboxes as it happens normally...
What is the solution for this?
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Oct 18, 2010
I've got a GridView that can be edited. My problem is that when I click Edit, the textbox is too small (the File Name column). It isn't large enough to display its contents, and it isn't as wide as the rest of the column.
How can I make that textbox wider?
Here's the ASP code:
<asp:GridView ID="FileGridView" runat="server" AllowPaging="True" OnPageIndexChanging="FileGridView_PageIndexChanging"
CellPadding="1" CssClass="GridView" GridLines="Horizontal"
Width="100%" AutoGenerateColumns="false"
AutoGenerateEditButton="true"
OnRowCancelingEdit="GridView_RowCancelingEdit" OnRowEditing="GridView_RowEditing" OnRowUpdating="GridView_RowUpdating"
>
<Columns>
<asp:BoundField DataField="Name" HeaderText="File Name" />
<asp:BoundField DataField="Length" HeaderText="Size" ReadOnly="true" />
<asp:BoundField DataField="LastWriteTime" HeaderText="Last Modified" ReadOnly="true" />
</Columns>
<RowStyle CssClass="GridViewRow" />
<EditRowStyle ForeColor="Black" CssClass="GridViewEditRow" />
<SelectedRowStyle Font-Bold="True" CssClass="GridViewSelectedRow" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<HeaderStyle CssClass="GridViewHeader" ForeColor="White" />
<AlternatingRowStyle CssClass="GridViewAlternatingRow" />
</asp:GridView>
There's C# code behind this to update the data, and that works just fine. I hope the solution to this is in the ASP, but if the solution requires some C# code.
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Aug 3, 2010
I am looking for some examples for gridview for common tasks like displaying, editing, deleting, paging, sorting, batch updates etc, but WITHOUT using any datasource controls. I would like to bind the data in the code to custom object collection. all the samples I found on the web so far use some data source control, I think Enterprise applications shouldn't be using this pattern. objects in my solution have only business logic and no data access code. instead I use manager objects to do this. if you have any examples of gridview that performs the common tasks without using any data source control.
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Jan 31, 2014
I have gridview which have 6 columns 3 columns are display from other table and 3 columns i want to enter i want when I press edit button all columns appear in edit mode and edit button change into update and when i press update all the data show which includes three auto display and 3 edit by me and all these 6 columns are also update in my database new table.
This is my .net code
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="Emptimesheet_sql" CellPadding="4" ForeColor="#333333" GridLines="None">
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:ButtonField Text="Edit" />
[Code] ....
And my sql table
CREATE TABLE [dbo].[Time_Sheet](
[Name] [nchar](30) NOT NULL,
[JobNumber] [varchar](30) NOT NULL,
[Totaltime] [time](7) NOT NULL,
[CostBySalary] [money] NOT NULL,
[CostByOverhead] [money] NOT NULL,
[Date] [datetime] NOT NULL
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Oct 22, 2010
I'm having some trouble with editing a gridview row's background color when Editing it.
The thing is, I am using the RowDataBound event method to change e.Row.BackColor based on a criteria when displaying the report( 3 different colors depending on result ). For the rows that don't fall under that criteria, a GridView's property <EditRowStyle BackColor="#999999" /> is applied upon clicking the Edit button.
However, I can't seem to find a way to change the color of those that do fall under the criteria since RowDataBound seems to be called all the time, overriding any changes I make.
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May 20, 2010
I have a datagrid which shows the search reasult(time entered by the user preveiously)on a button click event depending uppon the input name or date enter by the user,i want to show a drop down list for a field selection like depertment whenever user want to edit the data in datagridiew,i am using access database & asp3.5.
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Jul 26, 2010
I previously set up a local oracle express database on my computer and linked it to my asp website and within the options for the grid view it gave me 5 options (Enable Paging,Sorting,editing,deleting and selection) now that i have hosted my oracle (not express) database on a server the only options it gives me now are Enable paging, sorting and selection. any idea how i can get these options back?
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Mar 26, 2016
I havewrite the edit button code as
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
BindData();
}
in bindata i am doing this
GridView1.DataSource = ta.GetData();
GridView1.DataBind();
Now i want that when i click on Edit command button of GridView then that row remain highlighted till the next edit button is clicked in anothe row..
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Mar 1, 2011
I'm trying to create a nested gridview, but I'm stuck at the editing/deleting part of the nested gridview. (Below is my code).The nested gridviews are filling out nice, I've set the DeleteParameter in the SQLDataSource, but I'm still getting this error when trying to delete a criteria: 'The Gridview 'gvCriteria' fired event RowDeleting which wasn't handled.'I've tried to create a method 'gvCriteria_RowDeleting', but that didn't seem to work out.Someone who can give me a piece of advice? Would it be possible to fill the gridview without using gvDomain_rowDataBound? Dries
[Code]....
[Code]....
And the C# behind:
[Code]....
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Sep 7, 2010
I have a gridview which has editable columns.
The gridview lives in a formview, which lives in another formview.
Inside one column is an end date. This column has a textbox which gets it's value when I choose a date from a calendar control. However, when I choose a date from the calendar control, the program crashes instead of populating the text box.
Here is the page and the selectedIndexChanged sub for the piece of work I'm trying to accomplish...
[Code]....
Gridview2 is inside formview3 inside formview1I have included the whole page below, but the problem area is gridview2[Code]....
The error I get is:
[Code]....
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Feb 7, 2011
As the subject says, i display a gridview filtered from 3 dropdownlist, wich all the items are from a local Data base, once i display this gridview i want to select a row with a button then and add, modify or delete data from it and then this new info is saved on the data base, so when i display the grid again i will see the new info. Im working on visual studio 2010, i dont use code behind, all is in asp .net.
[Code]....
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Apr 2, 2010
I am using GridView in asp .net and editing data with edit command field property (as we know after updating the edited row, we automatically update the database), and I want to use transactions (with begin to commit statement - including rollback) to commit this update query in database, after clicking in some button (after some events for example), not automatically to insert or update the edited data from grid directly to the DB...so I want to save them somewhere temporary (even many edited rows - not just one row) and then to confirm the transaction - to update the real tables in database.
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Jan 11, 2011
Well the dropdownlist has an existing items. I just want the selected gridview record to be displayed in the dropdownlist. The dropdownlist has several DataTextField in string and consist of DataValueField in numeric. The gridview passes a string text to the box which has an equal or same item inside the dropdownlist. Whenever i passed a record from a gridview to be viewed in the dropdownlist it just duplicates the same item. Q: How can i simply pass a text inside the dropdown and just simply display it without adding on the list.
sample item on the dropdown:
--Select--
Account
Savings
after selecting on the gridview and display inside the dropdown:
Account
Account
Savings
(you see the '--Select--' was erase and replace with the selected record)
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Apr 26, 2010
I have a gridview, and I was trying to use SQLAdapter for the first time. I have it set up but I want the user to enter a Date in the last field of the Gridview and be able to update it. I was looking up examples, and I cannot get it to properly update. The field I want to be able to update is the "TADateUpdate" I have gotten it to show the texbox fields to edit, but I can't figure out a method to update properly.
[Code]....
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Mar 16, 2011
I'm trying to edit the header row of my gridview to look like this.As you may have noticed, this is the Gmail layout and this was indeed what i intended for. I want to have on my header row some buttons that would then execute some actions to all the selected rows (very much like Gmail).
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Aug 25, 2010
I finally got membership and roles setup and seems to be working. I have setup a page to allow the creation of a user and editing of roles for a user. I would like to setup a page with a gridview that displays all users and what roles they are assigned. I remember running across someone else that was looking to do the same thing, but cant find it. Not sure if it was in this forum or online somewhere else.
But i found that i can use the aspnet_Membership_GetAllUsers procedure in my db to get all the users, but how can i add the roles to each person and possibly setup the gridview so that each role they have, is displayed on their row in the gridview So i would like to see something like this maybe more data displayed depending on the client request.
Username Email Last Login Roles
meofcourse me@hi.com 08/25/2010 X Admins X Approvers
themofcourse them@hi.com 05/25/2009 X Approvers
The X indicating a checkbox.. and have it setup so they can uncheck the role, that triggers the update and causes the list to refresh and display the new current roles for the individual users. The procedure listed about does not return the roles, so wasnt sure if i could use that procedure and union it with another to get the combined results im looking for.
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Sep 30, 2010
I have a Gridview where the user can edit a row when he click on "Edit" (this is called update mode i thinck?).
When the editing is done, the user clicks on "Update" and the changes are written into the database. Additionally i set a "ChangeMarker" in the database that the data record has been changed by the user.
I identify the row in the database i want to update with the SelectedDataKey in the Gridview:
[Code]....
In the first line where I dim EdittedRow i got an error: "Object reference is not set to an instance object". I dont understand this error message.
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Jan 13, 2011
I have setup a gridview within an update panel, which resides in a tabcontainer. After I edit any of the rows within the gridview and hit "update" the page reloads and I am no longer able to edit any of the text boxes in the other tabs, and if I attempt to insert or edit a row within the same gridview I'm not able to edit those either. That said, when I hit the tab key a couple of times the cursor appears and I'm able to proceed with editing. Based on the number of times I hit the tab button, it appears that the cursor was inside the textbox I clicked, though it wasn't visible and I simply wasn't able to enter any text.
I've been trying to setFocus on a specific field after any of the grid updates, also tried setting the cursor using ScriptManager.GetCurrent(Me).SetFocus(Me.Control) with no luck.
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Feb 25, 2016
With reference to this article [URL].... I'm trying to access parent gridview datakey in child gridview edit row event. Code below.
protected void grvSubmittedExpensePerMachine_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView grvSubmittedExpensePerMachine = sender as GridView;
grvSubmittedExpensePerMachine.EditIndex = e.NewEditIndex;
string site=this.grvSubmittedExpenses.DataKeys[((row.NamingContainer as GridView).NamingContainer as GridViewRow).RowIndex].Value.ToString();
[code]....
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