VS 2008 Error - Unable To Cast Object Of Type 'System.Windows.Forms.MouseEventArgs'

Nov 7, 2009

When executing this code I get this error:

Unable to cast object of type 'System.Windows.Forms.MouseEventArgs' to type 'System.Windows.Forms.DataGridViewCellMouseEventArgs'.

Private Sub NoteGrid_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles NoteGrid.CellContentClick
Try

[code]....

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VS 2010 Unable To Cast Object Of Type 'System.Windows.Forms.MouseEventArgs' To Type 'System.ComponentModel.RunWorkerCompletedEventArgs'

Jun 25, 2010

My project worked a first and now its giving me a problem.The error

Quote:

Unable to cast object of type 'System.Windows.Forms.MouseEventArgs' to type 'System.ComponentModel.RunWorkerCompletedEventArgs'.

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Error : Unable To Cast Object Of Type 'System.EventArgs' To Type 'System.Windows.Forms.KeyPressEventArgs'

May 16, 2011

[URL]The issue is as soon as I change the value of the text boxes it gives me an error and forces me to close the project.

The error is:Unable to cast object of type 'System.EventArgs' to type 'System.Windows.Forms.KeyPressEventArgs'.

However I'm supposed to clear the number of gallons used and the total charged when a change is made to the contents of the 2 text boxes on the form.

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Invalid Cast Exception Was Unhandled - Unable To Cast Object Of Type 'System.String' To Type 'System.Windows.Forms.TextBox'

Feb 9, 2012

Private
Sub cmdExit_Click(ByVal
sender As System.Object,
ByVal e

[code]....

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Can't Copy Paste Cut Code - Gives Error "Unable To Cast Object Of Type 'Public_Information_System_Remake.PIS' To Type System.Windows.Forms.TextBox"

Mar 31, 2011

same errors or something related to System.windows.forms. Unable to cast object of type 'Public_Information_System_Remake.PIS' to type 'System.Windows.Forms.TextBox'.

[Code]...

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Unable To Cast Object Of Type 'System.Windows.Forms.Button' To Type 'System.Windows.Forms.TextBox'

Apr 28, 2009

I have a panel with some controls in it (several textboxes, a slider, 2 buttons, and a small groupbox).. When I click a button, I want all of the textboxes within the panel to be readonly... So I have this code: [code] When I run it though, I get the following error:Unable to cast object of type 'System.Windows.Forms.Button' to type 'System.Windows.Forms.TextBox'.If I remove a button, it moves on to give me the same error but for a label..

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Unable To Cast Object Of Type 'System.String' To Type 'System.Windows.Forms.TextBox'

Jun 12, 2011

Unable to cast object of type 'System.String' to type 'System.Windows.Forms.TextBox'.

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Unable To Cast Object Of Type 'System.Windows.Forms.Label' To Type 'System.Windows.Fo

Jun 12, 2011

i need to get data from checkbox in a groupbox. in the groupbox, it also have a label. so my coding as below

[Code]...

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Unable To Cast Object Of Type 'System.Windows.Forms.HtmlElement' To Type 'mshtml.IHTM

Nov 9, 2009

I have given reference to Microsoft HTML in COM (am using VB 2008)

"Unable to cast object of type 'System.Windows.Forms.HtmlElement' to type 'mshtml.IHTMLElement'."

I want to retrieve all the properties like the class name, html id of every object in the web browser. I am getting the above exception when i try to direct cast it.[code]...

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Unable To Cast Object Of Type System.Windows.Forms.MenuStrip

Jun 12, 2011

I have a form contain 10 checkbox. how to count total checkboxes that has been checked? i search over the internet but not found any solution. please help me. i found a code, but when i apply it on my project it says "Unable to cast object of type System.Windows.Forms.MenuStrip' to type Component Factory. Krypton.Toolkit.KryptonCheckBox'".i think i have problems with Me.Controls(on the code)[code]

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IDE :: DataGridView1_CellLeave(sender, New System.EventArgs), Unable To Cast Object Of Type 'System.EventArgs' To Type 'System.Windows.Forms.DataGridViewCellEventArgs'.

Jun 27, 2011

VB 2008, DataGridView,DataGridView1_CellLeave(sender, New System.EventArgs)

"Unable to cast object of type 'System.EventArgs' to type 'System.Windows.Forms.DataGridViewCellEventArgs'."

What is the Correct String for "New System.EventsArgs"

Anybody there is to help me out.

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VS 2008 : Error - Unable To Cast Object Of Type 'ObjectCollection' To Type 'System.Array'

Feb 24, 2012

I am using a background worker and am attempting to use the following code. However I keep getting this error on i "Unable to cast object of type 'ObjectCollection' to type 'System.Array'."

Private Sub btnVerify_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnVerify.Click
myArray = listProxies.Items()
BackgroundWorker1.RunWorkerAsync()
End Sub

[code]....

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Forms :: Display Picture In Picturebox1 - Shows This Message, Unable To Cast Object Of Type 'System.DBNull' To Type 'System.Byte[]'?

Dec 24, 2009

Now I want to display picture in picturebox1.To do this I use this codes, but it does not display picture

on this line: Dim arrPicture() As Byte = CType(dt2.Rows(0)("img_path"), Byte())

it shows this message,

Unable to cast object of type 'System.DBNull' to type 'System.Byte[]'.[code]......

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Error Unable To Cast Object Of Type 'System.Data.SqlTypes.SqlDecimal' To Type 'System.IConvertible'

Jun 6, 2011

I have an InvalidCastException Error in my program. The program is that i try to insert an employee record into a database table after getting the details from a form. I've used Money data type is SQL Server for salary and SqlTypes.SqlDecimal data type in employee template class. i've used a stored procedure to pass the values and i add the basic value by passing a parameter by the method

Dim prm8 As SqlParameter = com.Parameters.Add("@basic", SqlDbType.Money)
prm8.Direction = ParameterDirection.Input
prm8.Value = emp.Bsc

I've used the money datatype itself even in the stored procedure variable.I get the following error.

failed to convert parameter value from sql decimal to decimal
Even if i use
prm8.Value = Convert.ToDecimal(emp.Bsc)

I get an error Unable to cast object of type 'System.Data.SqlTypes.SqlDecimal' to type 'System.IConvertible'.

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Ado.net Error (Unable To Cast Object Of Type 'System.String' To Type 'System.Data.IDataReader'.)?

Jan 29, 2012

I am getting this error when I am tring to load string type to data table)

Using connection As New SqlConnection("connectionstring;")
connection.Open()
Using Command As New SqlCommand("SELECT ClientId,forename,surname from t_clientdetails

[code].....

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ASP.Net Error - Unable To Cast Object Of Type 'System.String' To Type 'System.Data.DataTable'

Oct 4, 2009

I get the below error Unable to cast object of type 'System.String' to type 'System.Data.DataTable'.This is the code I'm using

Dim str As String = String.Empty
If (Session("Brief") IsNot Nothing) Then
Dim dt As DataTable = Session("Brief")
If (dt.Rows.Count > 0) Then

[code]....

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Error - Unable To Cast Object Of Type 'AbstractListlistIterator' To Type 'System.Collections.IEnumerator

Dec 22, 2010

I have a series of API calls that are returning J# data types. I have been able to convert most of the data types (Integer, Boolean, Double, Float, etc) just fine.What I need to do now is convert a java.Util.Collection to a VB .NET collection (ArrayList)

Here is my attempt:

Public Function MakeDotNETCollection(ByVal javaCol As java.util.Collection) As Collection
Dim dotNetCol As Collection

[code]....

I keep getting a runtime error "Unable to cast object of type 'AbstractListlistIterator' to type 'System.Collections.IEnumerator.

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VS 2008 Unable To Cast Object Of Type 'System.String' To Type 'System.IFormatProvider'

Oct 20, 2010

I have a bit of trouble right here, I am trying to get the data from the site and input them in the listview. Well, when my main app start to load through on debug, then it start to display a warning. The warning is: Unable to cast object of type 'System.String' to type 'System.IFormatProvider'.

[Code]...

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Error : Unable To Cast The COM Object Of Type 'System._ComObject' To Interface Type 'Microsoft.Office.Interop.Word.CustomProperties'

May 10, 2009

I have been trying to use vb2008 to automatically update CustomDocumentProperties fields that I have set up within a pro-forma document. I can load the Word application and word document without problems.I want to update the CustomDocumentProperties fields with data read from a dB. To do this I am assuming that I need to iterate through the CustomDocumentProperties fields within the word document and when one is "found" that matches the data I wish to merge then assign the dB value to the field.The problem is that I am getting an exception error when I try to reference the document customdocumentproperties

"Error : Unable to cast the COM object of type 'System._ComObject' to interface type 'Microsoft.Office.Interop.Word.CustomProperties'. ...... "

my code looks like;

Dim WordApp As Word._Application
Dim odoc As Word._Document
Dim BContinue As Boolean = True

[code].....

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Unable To Cast Object Of Type 'System.Collections.Generic.List`1[System.Int32]' To Type 'crmWebService.ArrayOfInt'?

May 14, 2012

I'm getting an error after sending a list to a web service.This is the code that is calling the web service:

Dim sProgramInterest As New List(Of Integer)
crmService.InsertProspectGetId(sProgramInterest.ToList)
But I'm getting this error.

[code].....

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VS 2010 - Unable To Cast Object Of Type 'System.String' To Type 'System.Object[]'

Jan 25, 2011

For I = 0 To 10
If Items.Count = 0 Then Exit For
Dim T As New Thread(AddressOf Thread)
T.Start(New Object() {"Test", "Test"})

[code]....

When I put same code in empty project it works.

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Asp.net - Unable To Cast Object Of Type 'System.Web.UI.WebControls.Label' To Type 'System.IConvertible'

May 2, 2012

I'm creating a student evaluation form in a repeater that should submit the evaluation responses and update the SQL database, but I keep getting the error mentioned in the title. I'm coding in ASP.Net using VB.

Here's my code:

Student.aspx
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="Server">

[Code].....

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LINQ To SQL: Unable To Cast Object Of Type 'System.Guid' To Type 'System.String'

Nov 15, 2011

I am getting a really bizarre error and it makes no sense at all.Basically I have a user entity which has a Password property. This property is of Type Binary, the server data type being Binary(512).I am reading this value in and converting it to a byte array. However whenever I run my code I am getting a completely unrelated error of Unable to cast object of type 'System.Guid' to type 'System.String'.This strikes me as very odd since I am not using a property or variable of type string or GUID anywhere in this procedure where it falls over.

The code is below:

Public Shared Function ValidateUser(ByVal username As String, ByVal password As String) As UserValidationMessage
Using db As New EntityMapDataContext
Dim u = From user In db.Users
Where user.Username = username

[code]....

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Unable To Cast COM Object Of Type 'System.__ComObject' To Class Type 'System.Xml.XmlNode'

Jul 30, 2009

Code: Dim dom As New DOMDocument30 dom.async = False
dom.Load(serverAddress & "/App/filelist.jsp?type=content")
For i = 0 To dom.childNodes.item(1).childNodes.length - 1 downloadfile(dom.childNodes.item(i), mcount, currentpath) Next

The above code is activated upon clicking of a button. i have the server address declared. and using the domdoc to load the jsp file to generate the xml data. and using for loop, i call the download file function which accepts the following parameters

Code:Public Sub downloadfile(ByVal domdoc As Xml.XmlNode, ByVal totalcount As Integer, ByVal currentpath As String)

The totalcount and currentpath work fine, but when i pass in the dom.childNodes.item(i) , error pops up.

--------------------error message------------------------------------------Unable to cast COM object of type 'System.__ComObject' to class type 'System.Xml.XmlNode'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface.-------------------------------------------------------------------------------

[code]....

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Unable To Cast Object Of Type 'System.String' To Type 'System.IFormatProvider' Exception

Aug 7, 2011

When testing the followng code from Mastering VB2010, I get an Unable to cast object of type 'System.String' to type 'System.IFormatProvider' exception.In the Button1_Click event code Dim strmOut As New System.IO.StringWriter(SaveFileDialog1.FileName)the 'SaveFileDialog1. FileName' is underlined with a green squiggle and displays the following tool tip:Runtime errors might occur when converting 'String' to'System. Iformat Provider'.This is apparrently the problem but what does it mean and how do I fix it to get the code to work? 'Code being tested that runs the exception:Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click.[code]

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Unable To Cast Object Of Type 'System.String' To Type 'System.Web.UI.WebControls.Label'

Jun 6, 2011

I have a page that get value from SQL. I'm having a problem when I initialize Label object with field having TEXT data type.[code]...

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.net - Unable To Cast Object Of Type 'System.Int32' To Type 'System.String'?

Mar 20, 2012

I'm getting a sporadic 'Unable to cast object of type 'System.Int32' to type 'System.String' Exceptions at .SingleorDefault() in the below code. It works 9/10 times but randomly it throws an exception. I made sure that SettingID that i'm passing has no Null Values and the data in the table always exists for the settingID, and i'm always passing SettingID as Integer.

[Code]...

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FTP - Unable To Cast Object Of Type 'System.Net.FileWebRequest' To Type 'System.Net.FtpWebRequest'

Jun 6, 2012

[Code]...

Unable to cast object of type 'System.Net.FileWebRequest' to type 'System.Net.FtpWebRequest'.

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Unable To Cast Object Of Type 'System.Byte[]' To Type 'System.IConvertible'

Jun 5, 2010

i get the error in following code

Function ReadFile(ByVal sPath As String) As Byte
Dim data As Byte
data = Nothing

[Code].....

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Unable To Cast Object Of Type 'System.Int32' To Type 'System.String'?

Apr 11, 2012

iNCEEB = .First.NCEEB '<-- Im getting the error in this line, iNCEEB is integer .First.NCEEB is short.

NCEEB Server Datatype property is smallint

where is that "to type 'System.String'." coming from?

I'm using vs2008 and mssql2008.

[Code]...

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