I added a Gridview to my page and added a new item a delete button, now when i push that button there is an error... Do I need to add some code for it? And yes, can you give an example?
View 3 Replies
I need you assistance, Dynamic Delete LinkButton with CommandName=Delete gives me an error: Delete can only be called on a valid data item. nfact I am designing a Complex Grid using .Net 3.5 ListView Control with Scrollbar and Fixed Toolbar: This grid consist of 3 Tables:
1- footer
2- Toolbar Control
3- Scrolling Data Grid with Header
ListView give us only one ItemPlaceHolder to Bind Data as per LayoutTemplate, so I cannot able to manupulate my Toolbar Controls with ItemTemplate :(, therefore I decide to use ItemDataBound to add ImageButtons Dynamically using Init Page Event and I am able to get the result as you saw above:
ImageButton with funnel icon is with CommandName="Filter"
ImageButton with magnifier icon is with CommandName="View"
ImageButton with stop icon is with CommandName="Delete"
Now I can able to handle Filter and View with OnItemCommand Event but when I click Delete button I am getting an error as shown below: The grid used CSS I am sending you the HTML and code behind to resolved this problem: HTML CODE:
[Code]....
CODE BEHIND VB.NET
[Code]....
I have a ListView which I populate using DataTable.
In each row I have a delete button. When the user clicks on the delete, that particular row is deleted in the DataTable Table.
After I perform the delete, I want to avoid page reload just to populate the ListView with the new set of records without showing the deleted row.
I suppose LINQ is the best choice for this. But I am unable to implement it.
[Code]....
How do I reference the delete button to add the delete confirmation box when I have both the Edit and Delete buttons as the last two columns in the Gridview control. The following code works fine without any issues when I have the delete button only:
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType != DataControlRowType.DataRow) return;
int lastCellIndex = e.Row.Cells.Count - 1;
Button db = (Button)e.Row.Cells[lastCellIndex].Controls[0];
db.OnClientClick = "if (!window.confirm('Are you sure you want to delete this record?')) return false;";
}
But, when I have both the Edit and the Delete buttons, I get the following error when I click the edit button while the delete button works fine.
Specified argument was out of the range of valid values. Parameter name: index
How do I reference the delete button so the edit button is not affected in this case?
Using "Enable Delete" from Gridview control, I can delete (besides, update, sort, paging, etc) data from the database (this is done automatically). However, how can I delete the actual image that resides in my image folder (i.e. from "pix" folder )? What is the best way to delete image? If using code behind, how? Please write a full code for me. Here is my source code.
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="photoID"
I am using Sharepoint Designer and trying to insert a Delete button into a gridview. I added this to the top of my ASPX:
<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls"
Assembly="Microsoft.SharePoint, Version=11.0.0.0, Culture=neutral,
PublicKeyToken=71e9bce111e9429c" %>
and I added this as a Gridview column:
<SharePoint:DeleteItemButton
runat="server"
ID="CustomFormDeleteItemButton"
ControlMode="Edit"
/>
and this is the error I get:
An error occurred during the processing of . System.Web.UI.WebControls.DataControlFieldCollection must have items of type 'System.Web.UI.WebControls.DataControlField'. 'SharePoint:DeleteItemButton' is of type 'Microsoft.SharePoint.WebControls.DeleteItemButton'.
I've a listview in which i'm binding data from objectdata source. I have a requirement where i've to allow edit/delete for only certail listviewitem which meets specific requirement. How do i dynamically set that some item can be only be edited not deleted thus only edit button/link should appear and vice-versa.
View 2 RepliesI have one datalist,in datalist one column is UserName and in second column one button i.e. Delete. When I click on Delete then delete the this row from datalist.how to create this functionality.
View 1 RepliesI want to delete selected item of dropdownlist on Delete button click
Hint :1-It should also delete value from Database.
2-I want to Delete with the id of that selected item.
<asp:DataList ID="dlmycart" runat="server" RepeatLayout="Table" RepeatColumns="1"
RepeatDirection="Horizontal" CellPadding="0" CellSpacing="0" BackColor="Aqua"
Width="100%">
<ItemStyle Width="80%" BackColor="Violet" />
<ItemTemplate>
<table border="0" style="width: 100%; height: 300px; border: 2px solid Blue; background-color: ; text-align: center">
[Code] ....
A very simple question.
I am trying to delete a row from a Gridview but getting error in my Gridview1_Rowdeleting method on the line Gridview1.DataKeys(e.RowIndex).Value;
Error: Method, delegate or event is expected. Here is my Gridview
<asp:GridView ID="GridView1" runat="server" OnRowDeleting="Gridview1_Rowdeleting" DataKeyNames="RecAdvId">
<asp:buttonfield headertext="Delete" commandname="delete" datatextfield="MessageId" />
<asp:BoundField DataField="RecAdvId" HeaderText="RecAdvId" Visible="false" SortExpression="PanelId"
HeaderStyle-HorizontalAlign="Left">
</asp:BoundField>
<asp:BoundField DataField="Advert" HeaderText="Advert" HeaderStyle-HorizontalAlign="Left">
<HeaderStyle HorizontalAlign="Left" />
</asp:BoundField>
</asp:GridView>
Here is my code behind method which gives error:
protected void Gridview1_Rowdeleting(object sender, GridViewDeleteEventArgs e)
{
int x = _Gridview1.DataKeys(e.RowIndex).Value; //Error: Method, delegate or event is expected.
}
Try to delete a row in a gridview and get this error:
Parameter '@ID' must be defined.
Have tested the sql command in the query builder. I use Mysql and c#.
Here are the code:
<asp:GridView ID="GridView1" AutoGenerateEditButton="true"
AutoGenerateDeleteButton="true" runat="server" DataSourceID="MySqlDataSource1"
Width="350px">
</asp:GridView>
<asp:SqlDataSource ID="MySqlDataSource1"
ConnectionString="<%$ ConnectionStrings:processdbConnectionString %>"
ProviderName="<%$ ConnectionStrings:processdbConnectionString.ProviderName %>"
SelectCommand="SELECT * FROM computers"
UpdateCommand="UPDATE computers SET Priority=@Priority WHERE ID=@id"
DeleteCommand="DELETE computers WHERE ID=@ID"
runat="server">
I have an empty gridview with imagebutton,fileupload control,upload and delete buttons. I have uploaded one image to imagebutton through upload button. How to delete that row from the gridview.
I am using this code to delete a row
protected void grdImages_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Delete")
{
int deleteRowIndex = int.Parse(e.CommandArgument.ToString()); // Here i am getting the rowindex
if (grdrow.RowIndex == deleteRowIndex)
{
grdImages.DeleteRow(deleteRowIndex);
grdImages.DataBind();
}
}
}
Its not deleting the row. What could be the problem??
I have a gridview control on my page that lists records and sorts them according to the most recent to the oldest record. The most recent record is first record at index 0, and I want the users to be able to only delete the first record in Gridview. Is this at all possible? I'd like there to be the word 'Delete' next to the first record only.
View 4 RepliesI have a gridview on my page which is bound to an objectdatasource that gets Data from an Images Table in my database.The delete button is enabled and I have this code in my DAL.ELETE FROM [Images] WHERE (([ImageId] = @ImageId))Instead of deleting just 1 image, I want to give a user the option to delete multiple images at once.
View 10 Replieshow to delete a row only from gridview not the database?
View 4 Repliesiam insert data through gridview using datable, and i have 2button , insert and delete button , i wants to delete a row from the gridview using delete button below the code i constructed for insert, how to delete the row.
protected void Button2_Click(object sender, EventArgs e)
{
//delete button
} [code].....
When you push Gridview delete button, I want to alarm "do you want to delete register" . I searched in the internet and I wrote the code like that.
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="lnkbtndelete"
CommandName="Delete" runat="server">
[code]...
I have a gridview control in a webform which is shown below:
[Code]....
The desire is to remove a row both from the gridview and from the backend SQL Database table. So far I have written the following code:
[Code]....
The comments shown in the else clause of the if-else indicate the code that
I have several "standard" GridViews in the "admin" side of a web site I am developing. In the past, none of these have ever shown any problems with a standard Delete.
To review: Each of the subject tables has a "RowID" field specified as Identity and as the Primary Key.The BoundField for the Rowid is set to ReadOnly. There is "Edit, Delete, Select" specified for the CommondField. Edit and Select operate as they should.
HOWEVER, Delete results in a "Must declare the scalar variable "@RowID" (with the associated "unhandled exception" verbiage).
The DeleteCommand text in the SqlDataSource for the GridView reads
DELETE FROM [Events] WHERE [RowID] = @RowID
along with
[Code]....
I have inspected and compared with similar forms that function correctly and can see no differences (except for the table names).
I have wrote some codes and also i have added delete column with gridview and would like to make it work ,i mean when someone press delete button i want to delete that row.
here is my codes
[Code]....
I have a gridview which at run-time contains X number of records. Upon clicking a DELETE linkbutton on a particular row the gridview completely disappears from the page, when it should reflect simply the loss of that one record. Everything is okay on the database end, the record is deleted, so I know that part is working. I run a query and rebind the gridview within the Rowdeleted event. I even try hardcoded a value in the query which I know exists in the database and it still doesn't refresh with this record showing. Whatever code I need to post, let me know.
[Code]....
I use a gridview in my aspx page with a asp:CommandField for delete data.. I need a confirm for action, than I add:
Protected Sub lavorazioni_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles lavorazioni.RowDataBound
code for deleting with the chechbox i'm searching for it
View 3 Repliesi want delete one row of my gridview,but before delete it, ask if i sure to delete that record or not.
how can i write a configure delete code for my grid view
