SqlParameterCollection Only Accepts Non-null SqlParameter Type Objects
May 16, 2011I am developing a VB.NET application with SQL Server 2008 and I get the above error when I try to run this ASPX file. What is the cause?
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Sql - Error The SqlParameterCollection Only Accepts Non-null SqlParameter Type Objects, Not Int32 Objects?
Jun 23, 2012I am getting this error, Not sure why it is happening "Error The SqlParameterCollection only accepts non-null SqlParameter type objects, not Int32 objects."I have tried with all sorts of possibilties, now try to enter default data as dummy data,
Using connection As New SqlConnection
connection.ConnectionString = ConfigurationManager.ConnectionStrings("DentalDeviceConnectionString").ConnectionString
connection.Open()[code].....
The SqlParameterCollection Only Accepts Non-null SqlParameter Type Objects Not String Objects?
Jan 18, 2012Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Using conn As New SqlConnection("Database=Clinic_Management_System;Data Source=.SQLExpress;Integrated Security=True;AttachDBFilename=|DataDirectory|Clinic Management System.mdf")
Dim cmdRecord As SqlCommand
[code]....
The SqlParameter Is Already Contained By Another SqlParameterCollection
Mar 19, 2009I have a web application running written on ASP .Net.We have a class accessing the back end written in VB .net which has shared functions for DB interactions.The above error comes up when ever two users are in the same page... tying to do the same thing.Couldn't find a reason why this would happen.The scope of the SQL command is limited and parameters are cleared at the end.
View 2 RepliesAn SqlParameter With ParameterName '@intUserID' Is Not Contained By This SqlParameterCollection
May 28, 2009I keep getting a strange error message when I try to call my stored procedure. Possibly I have a syntax error? Not my store procedure does not return a value. Also the error message is included at the end of this post.
--VB .NET Code
Dim connString As String = ConfigurationManager.ConnectionStrings("EMRConnectionString").ConnectionString
Dim conn As New SqlConnection(connString)
' Create a new sql command, and reference the stored procedure by name
[code]....
Unable To Cast Object Of Type 'System.Data.SqlClient.SqlParameter' To Type 'System.Data.IDataParameter[]'
Aug 9, 2009My colleague gave me a DLL that manage all database business. I wanted to invoke a function that uses Stored Procedure and return the search result. In the function receive a parameter type in ystem.Data.IDataParameter[]. Below is my codes.
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No Accessible 'Count' Accepts This Number Of Type Arguments?
Apr 1, 2012I'm getting a very odd problem with a conversion from C# to VB (VB10 - .NET 4 target):
C#: IEnumerable<string> test = new string[] { "abc", "def", "ghi" };
int i = test.Count<string>();
VB:Dim test As IEnumerable(Of String) = New String() { "abc", "def", "ghi" }
Dim i As Integer = test.Count(Of String)()
the last line results in a compile error "overload resolution failed because no accessible 'Count' accepts this number of type arguments"
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The Null Value Cannot Be Assigned To A Member With Type System.Decimal Which Is A Non-nullable Value Type?
Sep 15, 2010I have a Job Register Table and that table doesn't have any records.
This is my LINQ code:
Dim QRecordCount = (From LC In CntxtJobDetails.JobRegistrations _
Where LC.JobCode <> 0 _
[code].....
The Null Value Cannot Be Assigned To A Member With Type System.Int32 Which Is A Non-nullable Value Type?
Aug 18, 2010When i execute this linq to sql command its given an error "The null value cannot be assigned to a member with type System.Int32 which is a non-nullable value type." 0 Records in my Commotidy Table
I want generate manual number and get the last CommodityCode.My Code as follow,
Dim QRecordCount = From RC In cntxtCommodity.CommodityMasters _
Where RC.CommodityCode <> 0 _
Select RC.CommodityCode[code].....
PayRoll Calculator On Vb - Program That Accepts Input Of Employee Name, Employee Type, And Number Of Hours Worked
Sep 30, 2009You need to design and create a program that accepts input of employee name, employee type, and the number of hours worked each week for two weeks.
You must be able to select an employee type. An employee of type Trainee makes $10 per hour. An employee of type Regular makes $15 per hour. An employee of type Manager makes $20 per hour.
The program should calculate the employee pay for the week. The employee should receive 1 times the regular pay for any hours worked over the prescribed 40 hours in a week. The program should output the following information:
-The employees name without trailing or leading spaces
-Regular hours worked
-Regular pay
-Overtime hours worked
-Overtime pay
-Total pay
The Problem that i am having right now is "Displaying " the overtime hours on my "FORM VIEW" i mean i did the math right its just when i type (lblOverHrs.Text = CDec(CDec(OvrHrsWrkWeek1.Text) + CDec(txtOvrHrsWrkWeek2.Text))
Its says the "OvrHrsWrkWeek1 and 2" are not Declared which are..im not really sure where i went wrong..
Heres my code
CODE:
Can Objects With Null Values Be Serialized
Dec 27, 2011I have used XML serialization to persist objects in my application but I am now interested in using null- able Data types for properties. Will I still be able to serialize?
View 6 RepliesDynamically Creating Objects - Error: A Null Reference Exception
Apr 13, 2011I am working on creating an application (game) for a PocketPC with Visual Studio2005 in VB/.NET. I try to dynamically create a (new)button upon clicking a label and assigning certain properties to this button. For this I used below displayed code, but this button does not appear on 'Form1' - which is big enough to display it- but creates an error: A NullReferenceException. Such occurs when you try to reference an object in your code that does not exist, but I think I just did by using'..New..' Who can tell me what is wrong and how to fix this? [Code]
View 16 Replies.net - Handle Null Nested Objects In RDLC Report That Is Bound To Custom Assembly Object Datasource?
Aug 27, 2009I have an RDLC report that I am rendering directly to the Response Stream as PDF (rather than using the ReportViewer). In the code that renders the report, it's DataSource is bound to a List(Of ClassA) objects defined in a custom assembly. This seems to work for the most part. My problem is that I can't seem to handle the situation where a nested object is null. For example, given ClassA and ClassB (the nested object) defined as follows:
Public Class ClassA
Public Id As Integer
Public Name As String
[Code]....
the report displays "#Error" if TheNestedObject is null. If TheNestedObject is not null, it correctly displays the Name.
Retrieve SqlParameterCollection In One Assembly Via DataAdapter?
Mar 11, 2011I'm having this dataadapter and its select command. In my application I create a reference to the assembly and via fieldinfo and bindingflags I even am able to retrive the command text of that dataadapter but what i need is to retrieve the sqlparametercollection of the following assembly.[code]...
View 7 RepliesAssigning Objects Of Different Type?
Jul 27, 2010I am new to VB.Net and I'm a little confused why this line happened to be valid in VB:
DataGridView1.DataSource = ds.Tables("Customerslist")
DataSource is of type Object while Tables("Customerslist") is of type DataTable. How will I know what types of objects can be assigned to the Datasource property?
Check Money Data Type Null In Net?
Aug 4, 2010I usually have a check to see if a certain database column is DBNull and if it is convert it. Current with a datatype of money in SQL 2008 with the row column containing
Null, i declare the equivalent value as Decimal (in .Net) then get the error "'DBNull' to type 'Decimal' is not valid".... How could i check this column for null and convert it?
Type.GetType Throwing Null Exception
Jan 25, 2012I am trying to get the type of a class by calling Type.GetType(), however it is throwing an null reference exception. I'm supplying the fully qualified name of the class as a string, I'm not sure what I am doing wrong. Here is what I am doing:Type.GetType("The.Name.Space.TheClassName")That is the fully qualified name of the class, it works fine for import statements.
View 2 RepliesChecking Objects Type By String
Apr 15, 2011How find an object's type when it is a subclass of another object and I only know the string value of the object's type's name. I created the following classes:
HTML
Public Class word
End Class
Public Class noun
Inherits word
[Code] .....
Then, in my code I create a new properNoun and check to see if it is a properNoun, noun or word:
HTML
Private Sub checkTypes()
Dim pn As New properNoun
MsgBox("Is a properNoun: :" & TypeOf pn Is properNoun) 'TRUE
MsgBox("Is a noun: :" & TypeOf pn Is noun) 'TRUE
[Code] .....
I correctly see that pn is a properNoun, a noun and a word. The problem is, using 'GetType' to check pn against a string value, I can only see that pn is a properNoun, not that its parent classes are noun and word. Is there a way to check pn against the string value "noun" or "word" and get back a positive result, indicating that pn is indeed a noun and a word as well as a properNoun?
IDE :: Handle The Events For This Type Of Objects?
Jan 15, 2009I created a Class which inherits Combobox and the listview is added . Now what I need is once the user click listview, the listview has to close and the clicked item has to added with combobox text. simply can say combobox1.text = listview.item(0).textFor closing & displaying the listview I need to handle the events. For
My Codings :========Public Class Combu_lstviewInherits ComboBoxPrivate treeViewHost As ToolStripControlHostPrivate Shadows dropdown As ToolStripDropDownPublic mylistview As New ListView
Public Sub New()mylistview.BorderStyle = BorderStyle.Nonemylistview.View = View.Detailsmylistview.HeaderStyle =
[code].....
C# - Any Reference To Profilecommon Causes Error Value Cannot Be Null. Parameter Name: Type?
Aug 11, 2010I have searched for two weeks, every night, exhaustively reading forum threads and trying all suggested solutions no matter how outlandish. Just as is the case with the many many forum threads about this same issue, the site works fine on my development machine. It deploys with no errors. It works from the production server and reads data from the database, but when it attempts to access a profile it crashes with this error.
A number of posts say to check or uncheck an option called "remove app_code.compiled file" but apparently this was a Visual Studio 2005 option. It is nowhere to be found in Visual Studio 2010. A number of posts say to make sure the App_Code.dll is present in my bin directory. It is present. I've deleted the app_code.compile file manually to see if that made any difference. I've changed the target framework from 4.0 to 2.0 and 3.5. I've completely deleted the site in IIS, created a different folder with a different name and redeployed the site with every combination of "allow this precompiled site to be updatable" and "Use fixed naming and single page assemblies".
i've included references to System.Web.Profile and System.Web and System.Web.Profile.ProfileCommon. I've created a new, fresh website targeting .net framework v4.0 and copied that web.config file to my application and recreated my profile entries to ensure that I didn't jack anything up in the config file along the way.
Server Error In '/' Application - Value Cannot Be Null / Parameter Name: Type
Aug 8, 2010I'm using VS2010, vb.net, .net framework 4.0, and SQL Server 2008 Express on Windows 7 Pro with all updates installed. I have developed a website that uses memberships, profiles, and roles. I allowed the built in providers to create the aspnetdb.mdf file for me in the App_Data folder. I added a number of my own tables to aspnetdb.mdf so I would have a single database for all my site's data.
I am hosting the site on my own server. It uses Windows 2003 Server, IIS 6, SQL 2008 Express, and all of my software including the OS is up to date with the the latest servicepacks, updates, and all of the .net framework updates including 4.0. There are no updates left to install and I'm sure that my issue isn't due to a missing update or framework version.
I copied the aspnetdb.mdf and .ldf files from my app_code folder to the sql server express folder on my server and attached the database. I do this because I don't want the file to autoattach, because I will likely use a commercial hosting service in the future. I added a sql server user with ownership rights to the DB. strong text
I then modified my connection string in web.config to point to the UNC of my SQL Instance on my server and to authenticate with the sql server username and password that I set up with ownership rights to that database. I updated my membership, role, and profile providers in my web.config file to use the new sql connectionstring and I was sure to include the application="/" setting and to use before each provider.
I can run the site just fine from my development machine. I can log on to it and use all of its features. However, when I publish the site to my server I can access the site, both locally over my intranet and over the internet. I can navigate around on it and it retrieves all of the data from the tables that I added to the database myself, but when I try to log on to it or to create a new account (basically anything that uses memberships, roles, or profiles) the site crashes with the error and all of the data below.
I've checked to verify that the application name in my aspnetdb database is in fact simply "/". I've ensured that I'm running from an application pool that is using the 4.0 framework. Much of the googling and reading that I've done seems to indicate a problem with my providers, but I can't understand why it works perfectly on Casini (or whatever the development server is called) on my local machine but crashes on my web server. In both cases they are connecting to the same database.
I would be so grateful if anyone could tell me what I'm doing wrong here. Following are the full error displayed by my server when the site crashes and also what I feel are the relevant sections of my web.config file.Full content of error message and relevant sections of web.config are below:
Server Error in '/' Application.
Value cannot be null.
Parameter name: type
[code]....
Attach A Routine To An Event Of All Objects Of The Same Type?
Jan 28, 2010Is there a way to attach a Sub or Function to an event of many controls at once?For instance, to clear a bound combobox I use this routine on the KeyDown event of the combobox:
VB
Private Sub MyComboBox_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles cboID.KeyDown If e.KeyCode = Keys.Delete Then sender.SelectedIndex = -1 End IfEnd Sub
But if I have many comboboxes, I have to copy the same routine over and over to all of them...Is there a way to attach the routine to the KeyDown event of all comboboxes?
Pseudocode example:
VB
Sub AttachEventOnKeyDown For Each ctl As Control In Me.Controls If TypeOf (ctl) Is ComboBox Then ' On ctl.KeyDown execute "MyDeleteRoutine(ctl)" End If NextEnd Sub
How can this be done?
Cannot Deserialize An Array Of Objects (of Variable Type)
May 8, 2011I've tried posting this to a few forums, even microsoft... Hopefully this forum is the place to be.
I'm programming an application in Visual Studio 2010, namely in VB.net. I have been developing an application which uses a derived class inherited from TreeView, with the aim of putting custom objects on the nodes. The method I have been using is to have a variable array against the node (of type object) which contains variables in custom classes to contain each of the variables associated with the node.
The two problems I had to overcome were, how to serialize a TreeView, and how to serialize an array of objects (of variable type). Good thing is I overcame both of these with some work of some other folks (and 3 days of my own work).[code]....
Collections Of Objects With Variable Data Type?
Jan 27, 2010lets say I have:
arecord.name = "A"
arecord.value = 15 ' a number of type "long"
'
I then
call records.add(arecord,arecord.name)
' so far, so good but lets look at the next record
arecord.name = "B"
arecord.value = "this is text" as opposed to a number of type "long"
'can I then
call records.add(arecord,arecord.name)
Getting An Exception Stating The Null Value Cannot Be Assigned To A Member With Type System?
Sep 14, 2009Lets say I have two tables:
Parent
PK
ParentID[code]....
These tables have a relationship where the Parent can have 0 to many Children.I wrote this query "Select * from Parent left outer join Children on Parent.ParentID = Children.ParentID", thus returning all Parents regardless of whether they have children.This would return something like this if run directly against the database:
ParentID
FirstName
LastName[code]....
Now what I would like to do is use the ExecuteQuery method on my LINQ data context to run this query and return the set of objects related to it.What I am expecting to happen is have LINQ return two Parent objects one (Joe Smith) with one child in its Children collection and one (Tina Jones) with nothing in the Children collection.However what I am getting is an exception stating "The null value cannot be assigned to a member with type System.Int32 which is a non-nullable value type.I am assuming, since the error message is not very descriptive, that it is talking about the fact the ChildID is an integer and is not nullable and cannot correctly generate a Children object with that value.
Find Objects Of A Specific Type In An Object Graph?
Jul 30, 2011Given an object instance, how can I recurse its members (i.e. the whole object graph) for an object of a specific type, or one that inherits from a specific type?
View 1 RepliesVS 2008 Convert Access Database Null Values To String Type?
Jun 7, 2011i am working in windows appl vb.net 08. And i am working in Access DataBase.I have one Table Called "Person" . In this "Person" Table one Column Name Called "OtherName". In this Column binded in one of the Combobox in a Form.But the Problem is "OtherName" Column having the Null Values.Before i bind this Column to Combobox i want to convert this NULL Values to String. Why i need the values in STRING means , In my code i using this Combobox as a filter in SQL Query.If i didn`t change the Null Value to STRING , The Combobox SelectedText or SelectedValue is Showing Nothing. So i am not able to get the Record.
Whn i write a Sql Query to Combobox and apply filter in WHERE statement like Combobox.Selectedtext or Combobox.SelectedValue In "Selected Change Committed Event" then i should get the record in the Output right but unfortunatly i am not getting the Record. The Record Count in DebugPrint showing 0.
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Overriding CompareTo When There Are Multiple Ways To Compare Two Objects Of The Same Type?
Jan 12, 2011What's a sound approach to override the CompareTo() method in a custom class with multiple approaches to comparing the data contained in the class? I'm attempting to implement IComparable(Of T) just so I have a few of the baseline interfaces implemented. Not planning on doing any sorting yet, but this will save me down the road if I need to.
Reading MSDN states mostly that we have to return 0 if the objects are equal, -1 if obj1 is less than obj2, or 1 is obj1 is greater than obj2. But that's rather simplistic.
Consider an IPv4 address (which is what I'm implementing in my class). There's two main numbers to consider -- the IP address itself, and the CIDR. An IPv4 address by itself is assumed to have a CIDR of /32, so in that case, in a CompareTo method, I can just compare the addresses directly to determine if one is greater or less than the other. But when the CIDR's are different, then things get tricky.
Assume obj1 is 10.0.0.0/8 and obj2 is 192.168.75.0/24. I could compare these two addresses a number of ways. I could just ignore the CIDR, and still regard as obj2 as being greater than obj1. I could compare them based on their CIDR, which would be comparing the size of the network (and a /8 will trump a /24 quite easily). I could compare them on both their numerical address AND their CIDR, on the off chance obj2 was actually an address inside the network defined by obj1.
What's the kind of approach used to handle situations like this? Can I define two CompareTo methods, overloaded, such that one would evaluate one address relative to another address, and the second would evaluate the size of the overall network? How would the .NET framework be told which one to use depending on how one might want to sort an array? Or do some other function that relies on CompareTo()?
.net - Add A @ In Front Of A SqlParameter Name?
Apr 20, 2012In one of our application the parameters passed to a stored procedure in this way
Dim parm As New SqlParameter("searchText", SqlDbType.VarChar)
parm.Direction = ParameterDirection.Input
parm.Size = 50
parm.Value="test"
cmd.Parameters.Add(parm)
and the procedure contains a parameter as @searchText
ie the parameter name passed from the code is searchText and that in the stored procedure is @searchText .
But it is working properly, i am always getting the required results.
So my question is like so there is no need to specify @ before the parameter? Whether it will append @
How To Define Decimal Sqlparameter
Mar 16, 2011I know to define integer type sqlparameter but I do not know the decimal type sqlparameter for the precession.
I am giving a sample example.
//Code
Dim sqlparameters(2) as sqlparameter
sqlparameters(0)=new sqlparameter ("@RMID", SqlDbtype.integer,7)
but in case of decimal I am giving like this
sqlparameters(1)=new sqlparameter ("@RMID", SqlDbtype.decimal,7,2)
which is wrong