I've got a painfully simple table that is giving me a "Specified cast is not valid" error when I try to delete one or more rows. The table has two columns, an "id" as the primary key (INT), and a "name" (VARCHAR(20)), which maps to a String in the LINQ to SQL dbml file. Both of these statements produce the error:
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I created a master record in the master table and then a record in the detail table. when creating the detail record i get a Specified cast is not valid error. Now another weird thing is that once I create the master record I can't query and verify it was created. But when i got to sql management studio I can see the master record. Below is my two procedures and the table definitions.
Implements System.ComponentModel.INotifyPropertyChanging, System.ComponentModel.INotifyPropertyChanged
Private Shared emptyChangingEventArgs As PropertyChangingEventArgs = New
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ok I have a weird issue. I created a master record in the master table and then a record in the detail table. when creating the detail record i get a Specified cast is not valid error. Now another weird thing is that once I create the master record I can't query and verify it was created. But when i got to sql management studio I can see the master record. Below is my two procedures and the table definitions. Master table primary key is INVNUM child table primary key it INVLIN_ID and the reference key is INVNUM
View 13 RepliesI'm trying to make simple payroll system using vb.net 2003 and Access 2007. When I press 'delete' button in this application, having a "Specified cast is not valid" error.
conPayroll.Open()
Dim strSQL As String
strSQL = "select*from EMT where Empno='" & mskEmpno.ClipText & "'"
comEMT.CommandText = strSQL
[code]....
When I attempt to use label1.ForeColor="#FFFF00" I get an error: "Specified cast is not valid."
How can I resolve this?
I have a .Net 2 solution with some asp classic pages.I get a specified cast is not valid error when I access the page on my local. Below is the vb function where I get the Error:
Public Function Retrieve(ByVal vntSeqId As String, ByRef vntPart As String, ByRef vntPartKey As String, ByRef vntEntDate As String _
, ByRef vntStatus As String, ByRef vntOrigGblId As String, ByRef vntOrigNetId As String,
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I have a DataGridView that is bound to a list of objects called "BaseChange". The BaseChange objects are made up of 4 properties...
ChangeType
ChangeStatus
ChangeDescription
LastChangeDate
The datagridview has columns for all 4 values as well as a 5th (a checkbox column called "colIsSelected"). There is no problem binding the list to the grid and displaying the items. The problem is that the query that gets the selected items in the grid is giving me an implicit cast error when option strict is enabled.
This is the query...
Dim _changes As List(Of BaseChange)
_changes = (From _row As DataGridViewRow In dgvChanges.Rows() _
Where Convert.ToBoolean(_row.Cells(NAME_COLUMN_IS_SELECTED).Value) = True _
Select DirectCast(_row.DataBoundItem, BaseChange)).ToList()
...and it produces the correct results with option strict off. The implicit cast squiggle is on the "row As DataGridViewRow" code, and the full message is "Implicit conversion from 'Object' to 'System.Windows.Forms.DataGridViewRow'*".
If I exclude the "As DataGridViewRow" from the query, I get a late binding error on the _row.Cells and _row.DataBoundItem and this also fails option strict.I need this to work with Option Strict enabled, and in VB.
I have the following xml:
<Root>
<Result img="1.png" name="a">
<Programs>
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What is wrong with linq query. Why does a 1 work but a 2 does not? I would also like xml structure preserved after filtering.
I have a datatable which has been dynamically generated from FoxPro tables using a UNION Select statement. e.g.SELECT * FROM x UNION SELECT * FROM y UNION SELECT * FROM Z ORDER By v_alue1This produces a datatable with about 100 rows, each containing many fields, one of which is c_olor. From this datatable, I would like to select the distinct colors and then output in a dropdown.I have a public class Color which just has one property which I can then use as the DataTextField and DataValueField for the dropdownlist
Public Class Color
Private _c_olor As String
Public Property c_olor() As String
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I was debating on placing this in the Office Automation section, but I think that the error is actually unrelated to concepts in Office Automation, and instead related to VB.Net.
Anyways, I have been programming a Metrics application for the past few months. For all intensive purposes, I have just completed the programming. However, I recently started to get the error "Specified cast is not valid". You can see the stack trace below:
Quote:
Message: Specified cast is not valid.
StackTrace: at Microsoft.Office.Interop.PowerPoint.OLEFormat.get_ Object() at Metrics_Application.Utilities.PrepareGraph(Present ation mainPres, String ObjectNum, Int32 slideDiff) in C:RSNF MetricsMetrics ApplicationMetrics
[Code]....
I am passing into the method the Powerpoint Presentation object, the string specifying the Object name of the graph Ole Shape, and an integer for the slideDiff (to help differentiate which slide the method is modifying). Also, for context, I am using this to automate a PPT presentation, using Powerpoint.Interop COM objects.
I have tried to research this on various forums. Typically, it seems like this problem is found when accessing databases, or when someone tries to put a string into an integer variable (or another type of incompatible variable type). Looking at the code, I always bring in the string for the Object Number...so the variable type is correct there.
frm = New ItemInventory("", Me.cbFabric1.Text, Me.cbColor1.Text)frm.ShowDialog(Me)after this in the openned form's Form Load event i'm doing the following
Dim dv As DataView
'here i've executed stored procedure
adapter = New SqlDataAdapter(cmd)
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I am having a problem with a datareader.
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Dear friends I face a strange problem I use Linq-to-SQL to insert data in vb.net. When I insert data into SQL Server through a DataGridView it gives error of which column data type is "integer" but when I insert data through textbox it not give any error
So I face problem of datatype "integer" to error of specific cast not valid
I am Working on Teghax Component.Using This Component we want to find out Block title attribute of dwg file or autocad file in a client server socket application.
1> We get Block title attributes properly of dwg file in windows application form using the Get_DwgFileAttribute function().
2> We also get Block title Attributes properly in that way:-We take a class library where we take a class.in this class we use Get_DwgFileAttribute function().Then We access the particular class from another project
But when we use the same class(Keep same structure) in client server socket program.Then it gives an exception.i.e ,"Spaicfied cast is not valid"I am Not getting any reply form teghax developer..I attached exception screen sort. How to solve this Exception
Code given Below :
CODE:
How to fix this Exception...........
When I run the code below I get the error "Specified cast is not valid." on the following row in the
intCheckBoxToonVrijeTekst01 = CInt(If(reader.IsDBNull(0), Nothing, reader.GetInt32(0)))
Private Sub VulMedewerkerVrijeVelden()
Dim strVulMedewerkerVrijeVelden_SQL As String = String.Format _
("SELECT " & _
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The datatypes in the sql server 2008 DB of the columns that I use in my query is "TinyInt".
iam currently using vb.net 2008, ive started a project and i need to import HTML line to a another HTML file that is being read in a web browser control, i've try something like :
Private Sub Line(ByVal Textmsg As String, ByVal type As String)
WebBrowser1.Document.Body.InnerHtml = WebBrowser1.Document.Body.InnerHtml & "</br>" & Textmsg
End Sub
on Vb6 it was working but on .net i received the following error Specified cast is not valid.
I have a text file with names that have spaces and commas. For some reason when I read the file it gives me this error. Code is below. Also, I am reading the file into a combobox.
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I'm having a trouble with a function from a class and I need some help.I've just 1 webpage and 1 vb file. In the vb file I have something like this:
Public Class myclass
Inherits System.Web.UI.Page
<System.Runtime.InteropServices.DllImport("somelib.dll")> _
Public Shared Function function1(ByVal par1 As string _
ByVal par2 As string) As Long
End Function
End Class
[Code]...
I am currently going through a book on beginning VB,NET and am trying to complete one of the exercises in the book. I have created a function that validates user entries to check that they are numeric and within certain a range.If text value is entered into the textbox I get an exception error saying that
"Cast from String to type double is not valid"
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conversion of date
if i used -- Date.parse("28/01/2011")
it gives me error as "String was not recognized as a valid DateTime."
so then i modify above code as -- CDate("28/01/2011").it gives me error as "Cast from string "28/01/2011" to type 'Date' is not valid." I used convert.todatetime also date.parseexact but nothing is working..
I am Working on Teghax Component.Using This Component we want to find out Block title attribute of dwg file in a client server socket application.
1> We get Block title attributes properly of dwg file in windows application form using the getattribute function().
2> We get Block title Attributes properly in that way:-We take a class library where we take a class.in this class we use getattribute function().Then We access the particular class from another project
But when we use the same class(Keep same structure) in client server socket program.Then it gives an exception.i.e ,"Spaicfied cast is not valid"I am Not getting any reply form teghax developer..I attached exception screen sort.Give me Suggestion How to solve this Exception
Code given Bellow :
Public Function Get_DwgFileAttribute(ByVal Sender As ClsTcpConnection, ByVal msgTag As Byte, ByVal message As String) As String
Dictionary = GetHashtable(message)
Dim varfilepath As String = CStr(Dictionary.Item("filePath"))
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I am trying to Delete an entity but am having trouble with an InvalidCastException. The debugger breaks at the Next statement in the ForEach loop.My entity class is called Material.
Dim materialsTable As Table(Of Material) _
= (New DataContext("Server=.SQLEXPRESS; Database=Materials; Trusted_Connection=yes;") _
.GetTable(Of Material)())
[code]....
I'm getting an invalid cast exception but I'm not sure why, here is the list of my conversions.
SQL -> VB.NET
char(4) -> String
varchar(50) -> String
tinyint -> Integer
char(1) -> Char
bit -> boolean
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I'm getting this error
Unable to cast object of type 'System.Int32' to type 'System.String'.
when doing a routine LINQ to SQL query:
Return (
From n In DbContext.Newsletters
Where n.NewsletterID = NewsletterID
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How is it possible that an Int32 can't be cast to String? How can I debug something this? Since it all happens deep in the bowels of LINQ, I can't even get any indication what field this is angry about.
Here's my [code...]
On this line "db.jobs2surveys.DeleteOnSubmit(deleteJob2Survey)" I'm getting the following error.
[code...]
What exactly does this error mean and how can I fix this? I can't find much info on Google.
My SQL Server database contains several views which are essentially filtered (WHERE) / ordered (ORDER BY) versions of some of the tables i.e. no joins.
An example would be my Downloads table, which has a view such as DownloadsOnlineOnly e.g.
SELECT * FROM Downloads WHERE Live = 1 ORDER BY FolderName ASC;
I can drag and drop these views onto my LINQ to SQL DataContext, and use LINQ to query these views and retrieve data fine...
But the foreign key relationships are not being picked up in my DataContext, so I've lost the ability to:
Dim dl as DownloadOnlineOnly = (From r in db.DownloadOnlineOnlies Select r).First
Dim fol as Folder = dl.Folder ' Syntax error as there is no association between
' DownloadOnlineOnly and Folder in my DataContext.
I understand why this is happening, but how can I get around this:
Without manually adding associations in my DataContext? Can I change the type of the Entity like changing the return type of an SP on the DataContext? Can I cast or convert between a DownloadOnlineOnly object and Download object? Or some other method?
Ok, just needing a 2nd set of eyes looking at this to make sure the error isn't something else other than my LINQ code here. Here's the function class itself:
Public Function GetJacketByPolicyID(ByVal jacketID As Int32) As tblPolicy
Dim db As New DEVDataContext()
Dim j As tblPolicy = db.tblPolicies.Single(Function(p) p.policyNumber = jacketID)
Return j
End Function
and here is the code which calls this class function in the web control form itself:
Dim p As tblPolicy
Dim j As New Jackets()
p = j.GetJacketByPolicyID(3000050)
For some reason it's flagging the 2nd line in the GetJacketByPolicyID function saying the specified cast is not valid. So I'm guessing it's something I'm doing wrong. I'm sure the tblPolicy/tblPolicies class works right since I can create a new instance of a tblPolicy and set a few variables by hand and return it, so that's not it. I've also checked the datarow I'm fetching and there's no null values in the record, so that shouldn't be it either.
I am getting "The directory name is invalid" while calling process.start function.My code is
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim p As New ProcessStartInfo
p.UseShellExecute = False
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Could anyone assist me in solving my problem ? My code was written in VB (VS 2003.)I got this error: System.InvalidCastException: Cast from type 'DBNull' to type 'Integer' is not valid. in my code.Here is the code line where I am getting the error: LeadCampusID = CInt(.Item("mkCampusID"))I fixed the error by making the changes in the code as :
If Not IsDBNull(.Item("mkCampusID")) Then
LeadCampusID = CInt(.Item("mkCampusID"))
Else
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VB 2003 Combobox collection from -3 to +3 The goal of the message is to warn the user that the systems only covers +- 3 timezones, if he types in for example +4 or -4, he gets the message (by the way: how to protect the system if he types for instance a character?)
When I run the application: 'Unhandled exception: Cast from string "click" to type 'integer' is not valid
Private Sub ComboBox1_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.TextChanged
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