Cause Of Invalid Operation Exception In Data Grid View For Process List Changed?
Feb 18, 2011
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MS has a patch for the OnListChanged event handler issue, even though it seems we have to pay to have access to it. This fix specifically addresses an error message when you press ESC to cancel adding a new row in .NET 2.0: [URL]
FIX: Error message when you try to press ESC to cancel adding a new row to a DataGridView control in the .NET Framework 2.0: "An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll"
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Apr 16, 2007
have a form onto which i've place a menu item called Exit. When I click the Exit, i expect it to close the entire application.Here is the code
Private Sub mnuExitApp_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuExitApp.Click
Application.Exit()
[code].....
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Feb 15, 2011
I have an application that I've tested on multiple machines. It runs perfectly on the development machine, but no others. I have itextsharp.dll included and registered in the installer (I used NSIS). On one of the other machines, this was retrieved from the system log:
Application: Evaluation creator.exe Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.InvalidOperationException
[Code]...
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Aug 9, 2010
please i have this exception in my project which i do not know how to solve it.The problem i think is not from my codes but it is from a tool box item i am using which is giving me that error if i delete that tool box item from my form this exception is not thrown.The item name is GrFingerXctrl class. This item will enable me to integrate a biometric fingerprint reader in my application.it is from an SDK i downloaded from [URL].
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Jan 25, 2010
when the user clicks on the add button another form launches, which enables the user to add student info such as name, address, course, start date and end date, this information is then written to class when the ok button on that form is clicked, and then displays the data on the initial form in data grid. the user can add multiple entries and they are all displayed on the intial form and a the data grid is populatedwhen any of the rows in the displayed grid is selected, and the update button is clicked then the same form launches as the previous one and but this time its in the update mode and pre populates the form with the inital values.
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Feb 6, 2010
i have a datagridview that show an access database also there is toolstrip menu i defined the datasource and everything is fine except that when i run the application and edit anything and when i press the save button on the toolstrip an error appear and highlight this: Me.TableAdapterManager.UpdateAll(Me.My_phone_numbersDataSet)
and the error is: invalid operation exception was unhandled
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Feb 16, 2011
I have a dataset returned after executing a sql query. below is my code to access the returned dataset and I seem to get this error sometimes and not all the time this code executes
Private Sub Timer1_Elapsed(ByVal sender As Object, ByVal e As System.Timers.ElapsedEventArgs) Handles Timer1.Elapsed
Dim currentMethod As String = MethodBase.GetCurrentMethod.Name
[Code].....
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Nov 19, 2009
In my MS Access database a certain column has been given a LookUp query so users can just select the appropriate entry from a drop down list.
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Feb 1, 2012
Keep getting a exception when I click one save.
"Invalid Operation Exception was unhandled"
Basically it just needs to save all my text in my text boxes in a XML document.
Imports System
Imports System.IO
Imports System.Xml
Imports System.Xml.Serialization
<Serializable()>
[Code] .....
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Jul 13, 2009
I am trying to write the code needed to link two tables together. One table is a list box and the other table is a data grid view. What would the example of the code needed in order to link these tables together so that each time you click on an item in the list box, the data grid would then show the corresponding information that matches up with the selected item.
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Sep 12, 2009
Got a proccess thread thats in charge of loading a listbox full of the first line of text for richtextbox items on form load. Though I use Me.Invoke(New MethodInvoker...) to add items on the main thread so its thread safe it coughs when the first line of rtf data are thrown at it, acting as if I hadnt called adding the items on the main thread.
Up at the class level:
Dim Worker As System.Threading.Thread
In the load procedure for the form:
Worker = New System.Threading.Thread(AddressOf WorkerDo)
Worker.Start()
[Code]....
I"ve also tried to remedy this using a delegate to invoke the listbox before attempting to update it, but the invoke method itself is throwing the exception. I am not using the default instance of the form (a new instance of this form is created). Anyone know how I can get around this? I can't load the listbox full of items directly in the form's load procedure because work takes place in the thread beforehand so there are strings to add to the listbox. I've got MS Visual Studio 2008 Pro and Vista SP2 (latest updates applied).
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May 27, 2009
how to fill List View and Data Grid from a Database (SQL Server).
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Nov 28, 2009
Any thoughts on what might cause a thread error like this?Error:InvalidOperationException was unhandledCross-thread operation not valid: Control 'Form1' accessed from a thread other than the thread it was created on.
Relavent Code:
Private Sub SerialPort_DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
[code].....
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May 9, 2012
I have 1 datagridview and i want to transfer all records to another datagridview, how can i possibly do that. Newbie here. This is my code in transferring 1 record to another datagridview to another one.
[Code]...
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Jan 14, 2010
This is a VB .NET application where we are showing the output of a SQL statement in a Datagrid view. using .NET 2005.We need to get the seperators of the headers on the grid control to be the same colors as the GridColor on the form. See the picture below:We've tried looking through all of the properties of the DataGridView control, and found some interesting things that looked promising such as the DataGridViewAdvancedHeaderStyle, and DataGridViewHeaderBorderStyle, but none of it seems to allow you to change the colors on it.Does anyone know how to do this without remaking the entire thing with a GDI+ control?
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Jul 15, 2009
how to cambine 2 data grid view into 1 data grid view
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Nov 11, 2010
i have datagridview populated with stock code, name and description.And i have docked my datagridview to the bottom. so whenever the form is resized, the bottom section will be occupied completely with the datagridview.But i want to display one extra empty column and multiple empty rows to completely fill in the datagridview.The extra empty column width will be adjusted to the right end side of datagridview.And the no of empty rows will be generated based on how many is required to fill up to the bottomSo that i can create datagridview with full column and row even though some columns or rows are empty.
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Jun 18, 2012
I have a list box like this,
<asp:ListBox ID="ListBox1" runat="server" Height="175px" Width="213px">
<asp:ListItem Value="all">All</asp:ListItem>
<asp:ListItem Value="programmer">Computer Programmer</asp:ListItem>
[code]....
and a Grid View like this,
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="XmlDataSource1">
<Columns>
[code]....
Grid View is getting values from a XML & XSLT file. What I want to do is, when user selects suppose Computer Programmer from list box, the grid view should get updated with the results of only those have this program. How can I do this? Do I have to bind the xml with List Box?
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Nov 15, 2011
I have actually two list boxes and grid view.The grid view has three coloumns fields.Now i want to customize the grid view with the list box. Suppose the fields are employeename,employee id,employee code. The left list box contains all the three fields namely employeename,employee id,employee code.There is an add button fixed so that on adding the selected row moves to right list box;the moved row gets removed from left list box.Now left list box has only rows employee name and employee id.Whereas right list box has employee code.Now when user hits Ok button the rows in the right list box are only highlighted.
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May 6, 2009
I have students who will be enrolled into a course. The student grid view has many columns like client_no, student_name, date_of_birth, address, etc. There are over 100000 students so I will need to filter the student grid view to find the correct student to enroll in the course. Once they are found, the user selects them and somehow moves them to the enrolled grid view. If a student drops out then they would be removed from the enrolled grid view.This process needs to be easy to understand and use. Are there any examples available or other suggestions on how to do this?
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Sep 8, 2011
I'm binding a ComboBox's SelectedIndex to a Nullable database field like so:
VB.NET
ColapsoComboBox.DataBindings.Add("SelectedIndex", EnsaiosBindingSource, "Colapso", False, DataSourceUpdateMode.OnValidation, 0)
As you can see, I've defined the NullValue to be zero, yet I get an InvalidCastException. Is there anything I'm doing wrong? Or is handling the binding's Format and Parse events the only way around this?
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Aug 16, 2010
I have been looking ages on Google trying to find a solution. 2 weeks now and I cannot find it anywhere. I am trying to send the Module.Filename path to a text box for each selected item within a list view.This is my overall Code and my progress, if there is anything missing or needs to be improved just let me know =
Imports System.Diagnostics
Imports System.Management
Imports System.Text
[code].....
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Oct 14, 2010
I just want to display data in a DataGridView (from SQL - already made the connection) based on what is selected in a ComboBox (data that is also coming from SQL). The 2 are separete on the form. I am using VB 2010.
This doesn't work for me:
objCommand2.CommandText = "SELECT ProductID, Name, Color, Size, ListPrice FROM SalesLT.Product WHERE ProductCategoryID = " & cbCategory.SelectedValue
[code].....
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Sep 28, 2011
I have an excel file that I would like to load into my form and display there.
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Oct 6, 2011
how to display data in grid view using code that you can edit, update and delete the data...do i need to have a stored proc in this?
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Mar 6, 2012
my data dosen't display in data grid view in WPF project this is my code is there any mistakes ?
Imports MySql.Data.MySqlClient
Imports System.Data
Class MainWindow
Dim con As MySqlConnection
Dim com As New MySqlCommand
[Code]...
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Oct 23, 2011
Use of DataGridView in visual basic 2010 for view,insert, update, delete from access database by using code
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Jul 20, 2009
I have a datagridview which have 5 columns. The name of the columns are T,C,F,S,H. [cod]e...
So i want to display this data in datagried view. I must display the number beside T to T column, the number beside C to C column and so on. It should only display number in the respective column. It should not display the T,C and so on. [code]...
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Feb 15, 2012
i have a form which search data in specific date and show result in the datagridview, what i want is that when delete button is clicked all datas that in the datagridview will be deleted sameway in the database
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Mar 8, 2011
I need to display (read-only, I don't want the user to be able to modify the data) a set number of log entries. I figured using the data grid view would be the best solution. Basically the data is an error log that contains 3 fields (columns)
ID (a number from 1-20), Flag (number from 0-255), and a Description (string). I don't want the data linked to any database or anything.
These events occur asynchronously so I need to be able to add events (rows) to the data grid as they occur.
I also need the ability to clear all events (rows).
I guess the first question is if the data grid view is the best control in VB to use.
Is there a good example on using the data grid on how to add data to the data grid view one row at a time?
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