I am attempting to use a GridView in asp using VB and I get an error message about content.I did some research and reformatted the XML document the datasource is referencing but still cant seem to get the GridView to generate.Error Message: "The data source for GridView with id 'GridView1' did not have any properties or attributes from which to generate columns.Ensure that your data source has content." [code]
View 1 RepliesI have a DataTable that is bound to my GridView via a method a created. The function returns a new DataTable each time, so I don't have direct access to the data that is in the DataTable.
I'm trying to update my database with the data from the DGV, but anytime I try accessing the columns or rows, I get an error saying the column/row index isn't correct.
I'm using the RowValidatedEvent and if use the following code in a dummy project while manually adding the columns, the result is predictable.
VB.NET
MessageBox.Show(dgv.Item(e.ColumnIndex, e.RowIndex).Value.ToString)
But when I do the same with my bound DGV, I get the exception mentioned above. This leads me to believe that I need to access the DataTable directly, but I can't because I get it from a method.
So is there a way to access the grid view's bound data? I've been playing around with various properties, but have come up short so far.
I have a gridview with a button, and when the button is clicked, it fires a rowcommand procedure and adds a new row to the database. Everything works fine until I add a databound drop down list to the gridview.
With a databound dropdown list, the page loads fine, but when I click the button the error shows as "Internet Explorer cannot display the webpage". here is my code
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowCommand="GridView1_RowCommand"
DataSourceID="SqlDataSource1">
[Code].....
I've got an asp:DataGrid which has an asp:Gridview within it and this has many nested asp:Repeater's within that and i'm trying to reference the nested repeater from within my OnItemDataBound function [code]This code may not be the simplest way of doing this but i've taken over someone else's work and need a quick fix before re-coding it all
View 1 RepliesI have a ListView with many advanced controls and html tags. ListView is bound to collection of profiles when first profile in collection is current profile. current profile has few differences from other profiles ie. flash embed, js and some other stuff. I can access inside of my ListView Container.DataIndex property which gives me 0 as first item in index but i'm unable to use inline If statements like so
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I created table named "tb_sale" using ms access 2007, it has 5 columns (date, product, qty, price, total)
I created a listview which has same columns with tb_sale (date, product, qty, price, total) Then, I dragged a datagrid (tb_saledatagridview) from tb_sale to the form, hoping i can insert multiple records from listview to tb_saledatagridview.
I manage to insert record from listview to unbound datagrid, but not for bound datagrid. code that I can use to insert and save data from the listview to tb_saledatagridview.
How do i get this code to load in to a listview rather than a gridview?
code
Private Sub loadCustomers()
[code].....
I got 2 forms. form A - listview Form B - gridview I like to know how to select a row in gridview and send the selected item into a listview.
View 5 RepliesI am having a heck of a time trying to figure out this email thing. I am using the Chilkat add-on tool.I can download the emails to the ListView box but they are all over the place and not neat and readable.Also how do you add rows to a ListView box??? Seems crazy that you can easily put columns but rows??? Forget about it...seems like trying to find a needle in a haystack.[code]...
View 2 RepliesTree View in ListView or GridView
View 9 RepliesI am Developing a Application, originally i had divided a form by splitter and on left Treeview and in Right it was DatagridView. Now the requirement is to add treeview in same window. That is either Listview with Treeview in it OR DatagridView with Treeview in It.
View 4 RepliesI created a project in VB.Net 2008. i use a code to Add,Update and Delete record. It works fine. The problem is: How to get current records informations when i click in gridview or listview value.
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I have a DataAccessLayer that returns a datatable. The business layer calling it also returns a type datatable.In my form, I call the business layer as a datasource of my gridview and then I binded it.
This codes are working in C# but I have problems when I converted it to VB.NET. During databind it displays the error: Data source is an invalid type. It must be either an IListSource, IEnumerable, or IDataSource.
Can i not bind a datatable in my gridview in vb.net? What do you think is the problem?
I have a gridview and have modified it following this article: url...to allow bulk updates. Whenever I try to update a row in this loop:[code]
View 1 RepliesI want to bind a multidimensional array to gridview, but it display the following error when running "Gridview1.DataBind()"
"Array was not a one-dimensional array."
The following is my code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
CreateArray()
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I have a gridview. Its datasource is set as follows.dtTable is a datable in which the values for the table will be retrieved. But when setting dtTable as datasource I get an error "Object reference not set to an instance of an object". What may be the reason for this?
gridview.Datasource = dtTable
gridview.Databind()
Im learning to use a gridview and a problem that im seeing is that putting an edit command in the gridview so that I can update a particular row. When I click the edit, it turns to the update as expected, I hit the update and the particular field turns the row into editable textboxes which is expected. The problem that I notice is that if I click another row, I get this error:
[Code]....
I am trying to add a new row into a gridview but for some reason i'm having a problem in the for loop.Directly goes to dtCurrentTable.Rows.Add(drCurrentRow) and of course, have an error "'row' argument cannot be null.Parameter name: row", because the tcurrentTable.NewRow was not executed.
Why is this happening?
Private Sub AddNewRowToGrid()
Dim rowIndex As Integer = 0
[code].....
i tried the code below to make the export to excel, but not working correctly i used this thread link text
HtmlForm form = new HtmlForm();
string attachment = "attachment; filename=Patients.xls";
Response.ClearContent();
[Code]....
(I work in VS2005, Access DB, C#). I was trying to insert a row in a GridView and the following is the code. When I run this page, it doesn't display the existing data and in the footer row when I click on 'Insert' after entering the data, I get the following error:
OleDbException was unhandled by user code
Index or primary key cannot contain a Null value.
Code:
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "[URL]">
<script runat="server">
protected void lbInsert_Click(object sender, EventArgs e) {
AccessDataSource1.Insert();
[Code] .....
When I click the "Update" button in the gridview, it fire the RowUpdating event, but it returns a error "Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index"
The following is the vb code:
Protected Sub GridView1_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
If e.RowIndex >= 0 Then
[Code].....
Error Dropdownlist has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value I have been banging my head over this error for about a week now. I have searched posted on other forums and still no solution to my issue. I have seen the FindControl being suggested but do not know how to implement this.
Basically I have 2 webmethods that reference 2 datasets which then populate my ajax cascading dropdownlist. In insertmode they work great however in editmode i get the above error.I have removed the selectedvalue and added
DataSource='<%# Bind("intRoom") which works sort of except for the fact that when you click edit it does not retain the original value of that particular record. Other things i have tried are as following:adding the items to the itemcollection of the dropdownlist turning appenddataitems to true on also tried to use the findcontrol but dont understand that punching my monitor and slamming my keyboard
Now I know i could get this to work by using a sqldatasource with some t-sql to get my dropdownlist to work however I thought by reusing my webmethods my code would be more professional. So if there is anyone out there that can help me understand why the value for my dropdownlist is not being populated or does not exist during gridview editing Also will post code if asked not sure what you would like to see rather than posting everything.
I have a page which has a GridView on it, which is populated from a database. Some of the columns in the GridView have text boxes, as well as Checkboxes.When the user saves the page, the page may error if they have not entered their data correctly. At this point, I need to re-display what they have entered already so they can simply make the correction instead of having to change everything from scratch again.
View 1 RepliesI have this code:Dim Result As New DataTable DataAdapter.Fill(Result)
'bind data to visible surname/name grid If Result.Rows.Count = 0 Then NoInputBottom.Text = "No Results. Please widen your search criteria and try again" NoInputTop.Text = "No Results. widen your search criteria and try again" Else
GV.DataSource = Result
GV.DataBind()
End If
I have also tried moving the check to the gridview like so:
If GV.Columns.Count = 0 Then
NoInputBottom.Text = "No Options Selected: Please select your search criteria and try again"
NoInputTop.Text = "No Options Selected: Please select your search criteria and try again"
End If
When I run the code. the noinput labels do not have value, the null check seems to be failing? Please can you tell me how to display a message if the search returned no reults.
i have a list box in the select indexchange event i have put a msgbox to print the 3rd subitem of the listview. On the first click its comming fine but on the second click it is throwing an exception ArgumentOutOfRange exception is throwing(InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index)
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I have a listview that when i select the items on it, then the id would go to a lable but when i click for another item with different id it has an error here is my [code]...
View 1 RepliesWhy the error occurs for the following
Private Sub LVW_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LVW.SelectedIndexChanged
txtTAID.Text = LVW.SelectedItems(0).Text
txtVNO.Text = LVW.SelectedItems(0).SubItems(1).Text[code]....
I did a little work around for my function which returns exactly 100 results back from my webpage.[cde]...
View 3 RepliesI am trying to use some VB6 code for a listview in my .net application. However, once it converted it to vb.net code i can not seem to get pass this:
Dim ListObj As System.Windows.Forms.ListViewItem
ListObj = LV1.FindItemWithText(Name_Renamed, True, 0)
It keeps telling me
InvalidArgument=Value of '0' is not valid for 'startIndex'. Parameter
name: startIndex
I've tried to input a 1 instead of a 0 but i still get the same error message as above
im having a problem on displaying my Date ng my listview here is my code
[Code]...