VS 2010 Parameter "variable" Has No Default Value
Dec 4, 2011
I am trying to code a program that inserts records into a database. I am reading the data values from a text file, storing them as variables, and then ATTEMPTING to insert them into a table. However, I keep getting the following error: Parameter vSales has no default value.
Here is my code
Private Sub ImportButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ImportButton.Click
Dim DataConnect As New
[Code].....
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Dec 9, 2010
its just like that in other langauges (php in the example)
function myFunction($message,$sender="nodoby") {
return $message." by ".$sender;
}
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Mar 30, 2011
im using data bound item with my combobox and this error pop up.
Parameter @UserType has no default value.
when i set the value,it stated that
"The changes you requested to the table were not successful because they would create duplicate values in the index, primary key, or relationship. Change the data in the field or fields that contain duplicate data, remove the index, or redefine the index to permit duplicate entries and try again."
should i edit my usertype column in my database or there have another solution?
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May 6, 2008
I am working on a very simple application in Visual Basic 2008 Express.
The program has a Listview where I display the "DisplayName" field, the user clicks on a name and this should fill 3 text boxes. The code is:
strSQL = "SELECT FName, LName, DisplayName FROM tStaff WHERE DisplayName=@DisplayName;"
Dim conn As New OleDbConnection(strConnString)
[Code]....
This produces the error "Parameter @DisplayName" has no defaul value"
The value of the variable "strDisplayName" is correctly captured.
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Apr 12, 2011
I want to include an optional parameter in a function statement that is of the type Unit. For example:
Public Shared Function NewTable(Optional ByVal TableWidth As Unit) As Table
Optional parameters require a default value, but I cannot figure out how to set a default value for a Unit type.
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Mar 9, 2012
We have a legacy component that has been converted from VB6 to VB.Net.The VB component was called from an ASPX page using Request("param") to pass optional parameters to function calls. That means the value is null/nothing if the parameter is not present.The parameters were then added to an ADODB call of a store procedure using Parameters.Append.When used from VB6 missing, Request("param") values were coerced into empty strings when passed to the VB6 component. This meant that the ADODB call was satisfied (for required parameters).When the code was ported to VB.Net, the null Request("param") values are now passed as null values (VB nothing?) and Parameters.Append skips adding the value if it is nothing. This caused the stored procedure calls to break as a required param was missing.
If we change the component's function parameters to be optional and have paramname as string = "" defaults, will a null/nothing value be converted to an empty string, or is null/nothing treated differently to a parameter being simply missing?
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Jul 28, 2010
I have a problem during defining a Sub routine in VB.Net. I am defining a sub routine which is as under
Private Sub ActivateControls(rdbutton as RadioButton, Optional txt as Textbox, Optional txt2 as Textbox)
End sub
When I call this sub routine It gives me the Error that Each Optional Parameter must specify a default value. So, Here I can't understand that what can be the default value of a textbox. What default value I can use here to remove this error.
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Sep 22, 2010
I think this is a pretty basic question, but I just want to clarify. If I have a variable with a null value, and pass it as a parameter that is optional, will the parameter get the null value, or the default value?
dim str As String = "foo"
dim obj As Object
//call 1
[code].....
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Jan 30, 2010
I am trying to do an insert into a table called Policy. I keep getting an error that says parameter @Split has no default value. To try and resolve the problem, I set the default value of the split field (of type text) in the Policy table to "0" in Access 2007. I am passing in the value of a string "0" into the parameter before the insert statement executes.
Dim connection As OleDbConnection = PaulMeadeInsuranceDB.GetConnection
Dim insertcommand2 As New OleDbCommand(insertStatement2, connection)
connection.Open()
[Code].....
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Nov 29, 2011
Argument not specified for parameter 'index' of 'public readonly default property chars(index as integer)as char'. Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
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Sep 18, 2009
My problem is this (apologies if this is a little long ... hang in there):I can define a function in VB.NET with optional parameters that wraps a SQL procedure:
Sub Test(OptionalByVal Arg1 As Integer _
Optional ByVal Arg2 As Integer _
Optional ByVal Arg3 As Integer
[code].....
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Dec 27, 2009
This is driving me mad! This is my code and I have attached my parameters below with my error. What on earth is wrong.
[Code]...
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Nov 25, 2011
I have a combobox which contains a sample of names selected from a table.Currently the default name displayed in the box is the 1st name found in the table. What I would like to do is display the name of the person who is doing the selection as the default. The name is stored in a public variable 'PubName' and I do not want the user to be able to type into the combobox themselves.Is this possible?
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Jul 27, 2010
Access 2007 and Stored Procedure. I keep getting this error: Parameter [@MyNumber] has no default value.
[Code]...
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Jun 26, 2011
Instead of:
NameValueCollection nvc=new NameValueCollection();
nvc.Add("A","Alpha");
I want to do:
nvc.Add(somevar, "Alpha")
Is there hashing going on against the key?
I have tried.... somevar = """ & myvar & """ and every other thing I can think of...
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Jun 26, 2011
When adding to a NameValueCollection you normally would do this:
nvc.Add("SOME LITERAL STRING", "MY VALUE")
but if you dont know the first parameter until you read it in from a file then you would want this:
nvc.Add(myVar, "MY VALUE")
this does not work! The NameValueCollection parameters SAY they want a string, but they really don't, they want a "Literal" sting.
So, the question is: How do I pass a variable string to the first parameter?
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Jan 30, 2009
I'm using a datagridview to display data and make updates to my access database. I was able to display data from my database to the datagridview but it is not filtered. The datagridview displays all the records on my database. I tried using query builder to execute sql select statements that will filter the data and this is where I'm stuck. Im using a variable as a parameter to the sql statement and I dont know what syntax to use in Query Builder. I tried to use @varname, '" & varname & "', and
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May 25, 2011
Is it possible to replace these two functions
Function f1 (s As String) As class1()
Dim a() As String = Split(s)
Dim b(UBound(a)) As class1
[code].....
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Mar 2, 2009
I am trying to run a query an Access db from VB. The general query which I want to run is
SELECT * FROM Patient WHERE Patient.PatientID = ?
or SELECT * FROM Patient WHERE Patient.PatientLname = ?
I tried using an input box which captured the user input and pass that variable to the query, but that failed.Then I read about writing a function and using that, however, I keep getting an error which says Function not defined, but when stepping through the code, it seems to work. Here is my function:
Module Module1
Public Function LookUpNow(ByVal userInput As String) As String
LookUpNow = userInput
Return userInput
[code]....
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Jul 20, 2011
I was wondering if it was possible to change the default variable name that shows up in the auto-complete for a Try-Catch block. It populates as:
Try
Catch ex As Exception
End Try
I want it so it populates as:
Try
Catch excError As Exception
End Try
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Feb 14, 2012
I'm having some difficulty with some code to update an Access DB. I keep getting "Parameter @ParamName has no default value" Renaming the parameter in both the SQL statement and the parameter.add, moves the error to a different parameter but it never goes away.
[Code]....
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Apr 21, 2010
Why are static variables set equal to 0 in the declaration when 0 would be the default value of the numeric variable anyway when it's first declared? Not including the "=0" in the static declaration seems to work with no problem.
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Apr 5, 2010
I have a button that is supposed to display the next row in my database, however Im getting the error "Parameter @ID has no default value"I can make my code work without parameterized queries but Im trying to make it work with them...So Im sure there is something wrong with my code, obviously
Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNext.Click
txtID.Text = txtID.Text + 1
Dim ds As New DataSet()[code].....
If I change my sql statement to
WHERE ID = "& txtID.Text &"
Then i can get it to work fine, but I hear that isn't good programming.
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Jan 10, 2011
Say that i have the following code that parse about 20k records from the DB.
Code #1
vb.net While reader.Read()
list.Add(If(Integer.TryParse(reader(0).ToString, 0), Integer.Parse(reader(0).ToString), 0))
End While
And then another code which does the very same thing but it seems to be a little cleaner.
Code #2
vb.net While reader.Read()
Dim storeowner As Integer = 0
Integer.TryParse(reader(0).ToString, storeowner)
list.Add(storeowner)
End While
This is what i am confused about; does the compiler creates a new variable automatically when i use the if statement without strictly declared variable? What approach is better in sense of performance?
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Jun 2, 2011
Say I have something like this
Dim Level1 as Integer = 83
Dim Goal as String
Goal = InputBox(" What level is your goal?")
[code].....
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Apr 7, 2012
I am trying to run a query an Access db from VB. The general query which I want to run is
SELECT * FROM Patient WHERE Patient.PatientID = ?
or SELECT * FROM Patient WHERE Patient.PatientLname = ?
I tried using an input box which captured the user input and pass that variable to the query, but that failed. Then I read about writing a function and using that, however, I keep getting an error which says Function not defined, but when stepping through the code, it seems to work. Here is my function: [Code]
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Jun 11, 2009
I am using VB2008 and SQL Server to populate a DataGridView from a SELECT statement. The SQL SELECT uses a parameter to access the requested row, but I get an error "Must declare the variable '@actionid'." Where and how do I declare @acionid? Here is my code (the error occurs on the Fill command):
[Code]...
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Apr 8, 2010
I am not too sure about the syntax , since I am still very new to VB..
So this is what I have in a class
Code:Public Class DocumentDelivery Implements IDisposable Public Shared RenderList As New List(Of Byte()())
Public Function Initialize(ByRef env As et.User.SystemCommon.Environment, ByRef errs As et.Exec.Utilities.ErrorCollection) As Boolean
[Code]...
I didn't write the existing class, I am just making changes to it. I am not sure why there is no constructor. However, Intialize() is called every time a the class is created.Right now, I set the default capacity of the RenderList, (the class variable) to 1 in Initialize method.
Is there a way to set the capacity outside of the initialize method? what is the syntax?
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Aug 2, 2009
I want to hear some discussion regarding what is the best way to persist program parameter and variable settings from one run of the program to the next. I used to often use the ubiquitous INI type file in VB6 programs but I am aware that these are not formally supported in .Net programs. I also have a major aversion to adding to the already overwhelming bloat of the Windows registry by using that to store values.
[Code]...
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Jun 24, 2011
I'm using the following
HTML
Dim conz As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:BdadosCV_PARTS.accdb;Persist Security Info=False")
[code]......
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