I need to call a function that expects a DataType as a paremeter. I fail to get the right syntax to specify a datatype (integer, string, single, boolean, etc):
Public Sub AddSetting(ByVal PropertyName As String, ByVal PropertyType As Type, ByVal DefaultValue As String)
Dim p As New SettingsProperty(PropertyName)
p.PropertyType = PropertyType
p.DefaultValue = DefaultValue
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PROJECT TYPE: Windows Forms Application
LANGUAGE: Visual Basic
.NET VERSION: 3.5
IDE: Visual Studio 2008
OPTION STRICT: on
OPTION EXPLICIT: ON
I need to populated a ComboBox and a CheckedListBox with a list of the Windows Accounts on the host computer. I also need to the user to be able to apply settings to the users individually. Thirdly, I need to find a way to add a startup registry key in the CURRENT_USER for a different user than the "Current User" (For example: User1 is an Administrator. User2 is a Limited Account [can't modify registry]. User1 needs to add Registry key to User2's "CURRENT_USER". This is a parental control application so the Admin accounts need to be able to access the registry from all users without affecting all users at once. I do not have any code to paste because I still have not the foggiest idea of where to start. I think it probably has something to do with an array (I have no experience with arrays whatsoever) but I am stumped from there. I'm a new, self-taught programmer so I speak idiot at times,
Summary of Questions
1) How do I retrieve a list of Windows Users?
2) How do I populate the objects above with such a list?
3) How do I interact with the items on that list (specific user accounts)?
4) How do I modify another user's CURRENT_USER Registry key?
I was wondering, what are the benefits of having a variety of different data types available to programmers?
View 1 RepliesI am working on a produce inventory database in my VB Express program. I have a form on the bottom and a spreadsheet at the top. I want to enter all the data in the form and have that data automatically transferred as a group to the spreadshet in the upper part of the page when I press a button.
I know that there's an insert function. I set it up correctly. The problem is that I have to convert the textbox, which contain string data, to the datatype used in the database spreadsheet. HOw do I use CAST or do this?
Here's the function I am using:
Me.TableAdapterManager.InventoryTableAdapter.Insert(IDTextBox.Text, fruitName, unitprice, unitsize, unitIn, unitTransit, unitOut)
Evernything is a string cause the data is coming from a textbox, I need to convert it to the datatypes used in the database.
Ever since I moved from VB6 to VB.NET somewhere in 2005, I've been using CType to do casting from one data type to another. I do this because it is simply faster to type, used to exist in VB6 and I do not know why I have to be using DirectCast if there is apparently no difference between them.I use TryCast once in a while because I understand that sometimes casting can fail. I however cannot get the difference between CType and DirectCast.
View 3 RepliesUsing VB.Net and C#.Net.
For Example
Am Using More than one form
If am assigning a variables like this.[code]...
This variables cannot be easily understand for everyone(other programmers).
How to assign a Standard Datatype variables,
Standard Variable Means (Everyone can understandable)
And also How to give a standard name for gridview, text boxes, labels etc.
Changing datatypes of properties of serialized objects?
View 1 RepliesAnyone have any insight on the Big O notation for comparisons for a LINQ Except query using primitive datatypes? I couldn't find anything on google.
View 3 RepliesI'm looking at the following in the Data Types docs for the Windows API:
#if defined(_WIN64)
typedef __int64 LONG_PTR;
#else
[code]....
I defined the following extension of the Date? data type
[Code]...
But when I moved my compiler definition to a separate DLL, I the ToObject method was no longer available from my project even though I had referenced the Class project which now contained the extension. Is this a limitation of the Compiler Extensions? HOw do you get reusability out of them?
It looks like they are converted to regular date types in the generated proxy object.I'd like to optionally pass null values for these dates.Other than switching to WCF (no time to learn it right now), what is the best way to handle this situation. It looks like I also cannot pass NULLABLE date types.
View 1 RepliesI'm writing a query to select all records that has any part of parameter. I have one table called Employees. Some people have name like this: John David Clark If the parameter is
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I should be able to get result back as long as there's a match in the parameters. If I use Function Contains (q.FirstName & " " & q.LastName).Contains(employeeName), I will not get any result back if employeeName is "John Clark" Function Contains looks only for next words from left to right. It doesn't match a single word at a time. So that's why I used this in the Linq to SQL:
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I am getting error [07002] the # binded parameters < the # of parameters makers, i checked both parameters were perfect even though i am getting this error here is my code
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how can i convert these datatypes: date to string and integer to string.Because it must be in a string datatype when I display it in a datetimepicker and textbox.
View 3 RepliesI've been trying to pass two parameters to my report using code the two parameters are DateTime type, my problem is crystal report viewer is still asking for the first parameter only and it accepts the second one?! in my report i've used two parameters ?firstDate and ?secondDate as dateTime parameters and used them in selctionformula where the date is between the two paramters.[code]...
View 4 RepliesHow can I set up parameters to work with my project?
Like execute_shell("myapplication.exe -filename.txt") or anything like that.
I am working vb.net08. Access Db. I am sending my below code for refference. Actually i am getting error when i am sending values from datatable to Temp Table in the Access Db. Error is : "No value given from one or more requaired parameters". In my datatable name called 'Crosstab1' few columns having text type and few columns having Value type. So i am getting error while i am Inserting values into Temp Table Called 'Official'. My Code is:
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Can anyone see what I'm doing wrong in this
Dim connStr As String = "connection string goes here"
Dim conn As New Odbc.OdbcConnection(connStr)
Dim comm As New Odbc.OdbcCommand("insert into mytable values (0, @P1, @P2, null, @P3, 'n')", conn)
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I get "A syntax error has occured." It appears as though my parameters aren't getting replaced with the values I'm telling it to use.
we are suposed to create a program that we like with certain peramiters, I have done as much however I have an error and I can not find a solution anywhere. We are, before you ask, able to seek help on this matter. Here is what I have:
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I cant seem to find a solution on how to pass parameters to another exe like adding some parameters after path in shortcut, and then launching that shortcut, only I want to do it directly without making shortcuts. So ,how would I pass parameters needed to start another exe (console in my case)?
View 1 Replies[code]That code will add a new DropDownItem everytime I click on it, then everytime I click on those new created items it calls my "aa" function. How to I set this up so I can send a parameter? It just needs to be a single int parameter.
View 15 Repliesi've got a database with a table called Customers, and i've created a form so that i can edit the customer details and update the database. However when i click the update button, it doesn't work and keeps coming up with the error which i've put in the title.
Private Sub btnupdatecustomer_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnupdatecustomer.Click
If MessageBox.Show("Are you sure you want to update your details?", "Save", MessageBoxButtons.YesNo) = Windows.Forms.DialogResult.Yes Then
Dim intPosition As Integer
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The bold/underlined text is where the error is coming up.What am i doing wrong? I've got a feeling it is something really stupid as i modelled the code on an example project that a teacher gave me, so it's practically the same code except for the field names etc.
as i need add the two commandline parameter on debug window.
/url=
one is okay
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i would like to know something more relating to parameters. i have always been adviced to use parameters but i am bit confused as to how to use parameters while filling a dataset like if i am using a oledbcommand i can always use paramters but how do i parameterise the following :
dgMastDet.DataSource = Nothing
myBindingPenBase = Nothing
txtCd.DataBindings.Clear()
[code]....
i am using the above code to filter a list in the dgv as a help dialog for the selection of a master.my prob. is the now xFilter is to be typed in a regional language. so it is bound to have an ' as a character at some point or the other and if that comes in the char. then it will b giving me an error.. so how do i use it as a parameter ?
i know how to use parameters on INSERT, UPDATE and DELETE into sql server.like:
VBNet
updateCMD = "UPDATE table SET somevalue= @valueparam1 WHERE ID = 2"
Adapter.SelectCommand = New SqlCommand(updateCMD)
[code]....
I am using Visual Basic 2008 / MYSQL
Basically i have 2 tables in mysql called Data and products
The first sql query i want to do is something like this to scroll through the recordset of products and bring back information;
dbquery.commandtext = "select quantity, sku, condition from products"
But then what i want to do is bring back information from the Data table based on the sku and condition of the first sql?
so it would be something like this
subquery.commandtext = "select lowestprice from data where sku = *SKU FROM FIRST TABLE* and condition = *CONDITIONFROM FIRST TABLE*"
In java the constructor is as follows
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can i make 4 constructors with diffrent parameters. now in vb how can i write constructor with parameters.
Basically Commands has Parameters and parameters has functions like Add, AddWithValue, and etc. In all tutorials i've seen, i usually noticed that they are using Add instead of AddWithValue.
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since it saves my coding time. So which is better to use? Which is safe to use? Does it improves performance?
is there a way to get the GET parameters and POST parameters in just one function or Collection in ASP.NET? Like using $_REQUEST in PHP? I'm using VB.NET.
View 3 RepliesThe 3rd sub below (WorldMapViewer1_AreaMouseClick) handles "e.Area.Name" just fine. But I need my 1st sub ABC() to pick up the same "e.Area.Name" information and pass it to the 2nd sub LoadStateIndex() before anything is done in the 3rd sub.
Private Sub ABC()
LoadStateIndex()
End Sub
Private Sub LoadStateIndex()
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