Defining Different Datasource For Dropdown?
Jan 22, 2010
I have a dropdown where the items initially are filtered (using a SQL Datasource) based on the selection of another dropdown; however, I have included a checkbox where if checked, the dropdown needs to populate with all data from another datasource How do I programatically remove a datasource that is bound to a control and then define another?
I have the following code, but it errors:
If cbOverrideArea.Checked Then
Me.ddArea.Items.Clear()
[code].....
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Aug 15, 2011
I have a goal to have dropdowns populate using a string array as the datasource. Re-binding works well in the dropdown event, but if I make a change to a currently selected line item it won't change until I make the box dropdown again. Is there a way to keep this updated without re-binding the data?
Also, this is one of several dropdowns on an MDI child form. I'd like to make sure they're all synced. For instance if one has "Bob" selected and I change Bob's name to "Chris" I need all the "Bob" dropdowns to change to "Chris". Is there a way to do that without having to cycle through all the windows and call a rebind function?
Finally, I want to know if there's a better way to do it than the way I'm doing it. Since all these children have to be synced, the MDI parent holds the String array as a public property and the children each leech off of it.
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Jun 14, 2009
I gather MATTER NUMBER and PATENT NUMBERS in a listbox on a dialog form - that I pass to the main form after the dialog closes.I then ask for CASES on subsequent dialog forms and want to have drop downs for MATTER NUMBER and PATENT NUMBERS that "have the suggestions" of what was entered in those list boxes earlier.So - I've been using DATASOURCE for binding to datatables and thought to myself - heh - I can probably set the DATASOURCE of the DROPDOWNS - and it works!
Public AddMatterNumber As ListBox
Public AddPatentApp As ListBox
MatterNumber.DataS
[code].....
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Mar 27, 2008
I'm trying to make my datagrids datasource change when you select a particular item from a drop down menu but all I get is blank cells! any ideas? I don't think it is changing the colums property automatically either.
If chooseType.Text = "Add / Edit Players" Then
updateDB.DataSource = PlayersBindingSource
[code].....
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Aug 15, 2011
I have inherited a database that is moving to the web. Problem is that some of the string fields have html characters....
One example is....
"" without the quotes, IT WON'T SHOW UP IN HERE EITHER, trying something else. At any rate it has < and the > signs with text in the middle.
How can I escape any possible combination of html references.
SelectCommand="usp_getSingleStringData" SelectCommandType="StoredProcedure"
<SelectParameters>
<asp:SessionParameter Name="shrtText" SessionField="shrtText" Type="String" />
[Code]....
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Sep 3, 2009
I have a list of servers in the first dropdown. I want to get list of all databases in the second dropdown depending on the server selected in the first dropdown.
For this I need to query each server while selecting the server.
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Jan 30, 2011
I use vb.net and windows form and sqlserver
I added Data Source(Microsoft SQL Server (SqlClient)) to my project. and now I need to change it to ODBC Data Source .
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Oct 2, 2009
Am I just limited to the VB pen colors, e.g color.orange, color.black etc or can I define my own rgb colors? If so, how do I do that?
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Jul 17, 2009
I have .cls files that have attributes for XML files, and i would like to refer to them in the main body of my code without having to define each one as a class in the code as this would be writing them twice. How can i refer to a .cls file in a vb.net form? If you're not living on the edge, you're taking up too much room
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Nov 10, 2009
I would like to define an interface in the same manner as IDispose. By this I mean that when the interface is implemented it would add functional code.
For example when IDispose is implemented it adds a fully defined Dispose method rather than just an empty sub routine.
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Jan 27, 2010
What would the folowing VB.NET enum definition look like in C#? [code]
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Sep 16, 2009
How do I define the controls from another class? Here is my code (highlighted) -
Imports System.Windows.Forms
Namespace Bryanlgh.Echo.Views
Namespace Bryanlgh.Core.Tasks
[Code]....
I also tried using Imports Bryanlgh.Echo.Views instead of Namespace and it also came up with 3 error messages -
1. Namespace or type specified in the Imports ' Bryanlgh.Echo.Views' doesn�t contain a public member or cannot be found.
2. Name 'cboPcpMd is not declared.
3. Name 'cboPhysicianPerforming' is not declared
How should I define these controls?
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Jun 21, 2010
I am using Excel interop in my VB.NET program. My problem is that I can't seem to figure out how to write to Excel *and* define the Range using numbers.Alright, so I have objects being created depending on the file that the user opens. So there could be 100 objects or there could be none. Now each object has an array of values, and these arrays contain nearly 15000 elements. So here is what I want to do but I can't figure out how to escape using the LetterNumber:LetterNumber combination.
For every object I want a new column to be occupied and for every element in the objects array I want the row to be occupied. I figured the easiest way to do this was using a for loop but, again, I can't use numbers.
For columns = 0 to NumberOfObjects
For rows = 0 to NumberInArray
Cell(0,0).Value = myObjectsCollection(column).Array(rows)
Next
Next
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Aug 10, 2010
I am using Excel interop in my VB.NET program. My problem is that I can't seem to figure out how to write to Excel and define the Range using numbers.
Alright, so I have objects being created depending on the file that the user opens. So there could be 100 objects or there could be none. Now each object has an array of values, and these arrays contain nearly 15000 elements. So here is what I want to do but I can't figure out how to escape using the LetterNumber:LetterNumber combination.
For every object I want a new column to be occupied and for every element in the objects array I want the row to be occupied. I figured the easiest way to do this was using a for loop but, again, I can't use numbers.
For columns = 0 to NumberOfObjects
For rows = 0 to NumberInArray
Cell(rows , columns).Value = myObjectsCollection(column).Array(rows)
Next
Next
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Dec 15, 2011
How do we create relation ships between tables using a sql query?im using MS Access and VB.net.
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Jun 1, 2010
I used to do this is VB6:
Type Record
A As Long
B As String
End Type
Dim Rec As Record
When I keyed in "Type" in my declarations, I was asked to change it to "Structure". After that, I was not able to define anything inside. So, what do I need to do?
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Feb 18, 2012
I have to define a name for a varying-length column of cells. The name is used later to define the range for a Data Validation List. I just cannot figure out (and the Help Function isn't assisting) how to define the Name, say "DropOrdNum" using a variable as the address for the last cell in the range. It is easy to define a name for "O13:O2000" - no problem, but then I have a whole lot of blanks in my drop-down list. But how do I define a name for "O13:LastCell", by making "LastCell" the Range Variable (am I correct in this) for the address of the last cell in the active range and then defining the name "DropOrdNum" as being the range "O13" to either "O(the row number of the last cell)" or "LastCell", being the address of the last cell in the active range, which varies by the hour?
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Jan 29, 2011
I know you can dimention a variable and assign data to it at the same time using dim a() [1,2,3,4,5,6,7}but how can you do this with multiple arrays.is it something like [code]
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Aug 21, 2009
In C# you can use the implicit keyword to define an implicit user-defined type conversion operator.In VB.NET you can define a CType conversion operator that will explicitly convert a user-defined type into another type.Is there a way to declare an implicit conversion operator in VB.NET?
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May 14, 2009
Is it possible to define two variables in a vb2005 For loop in a similar way that jscript does it?
the javascript example is
for(i=0,l=0;i<20;i++){}
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Apr 3, 2010
The below sub-procedure isn't working like I expect it to. Basically, I have 9 fields on a tab control. When a user clicks in one of the fields, I wish for the field to "SelectAll" if their is a value already in the field. As you can see, the way I have it structured...only 1 field will do this, however, even this is not working.
Private Sub txtAddr1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtAddr1.Click, txtAddr2.Click, _
txtAddr3.Click, txtCity.Click, _
cmbState.Click, txtZip.Click, _
[code]....
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Dec 16, 2011
I've got a bunch of duplicate code that looks like this:If mValue is Nothing Return ""Return mValue.ToUpper
I defined the following extension method to reduce duplicate code:
[Code]...
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Jan 27, 2011
How can I use a MembershipProvider in a Winforms application without defining ConnectionStrings, Membership and RoleManager sections in app.config but creating instead all needed objects and configuration settings at runtime?
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Oct 28, 2009
So my latest project focuses on sending txt commands over from my cell phone to my email, which gets read by a program, that carries out the specified command. My latest command i want to implement, is being able to define words, and have it send me a txt back with the definition. Now I know how to send texts, and all of that stuff, but I have found it hard to find anything on defining words. At first, i tried to read websites, and simple redirect a webpage to google definitions, but that led me nowhere.
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Sep 29, 2011
I am trying to create a property and declare it as a dictionary. This property will be updated and called upon throughout my project. I may be complicating the issue but here is what I have...
vb.net
Private Shared m_ItemName As Dictionary(Of Integer, String)
Public Shared Property ItemName(ByVal Tkey As Integer, Tvalue As String) As Dictionary(Of Integer, String)
Get
[code]....
What I wish to do with the dictionary is to keep a record of the amount of items selected, the Key will be the Integer in the dictionary and will be the ID of that item in a database while the String will be the name of the item matched to that ID in the database.The user will be allowed to enter up to no more than 10 items at a time (overkill but necessary for the unknown).I was originally going to use an array statically declared allowing up to 10 items (eg. Private Shared m_ItemName(,) As String = New String(9,9) {})
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Sep 3, 2010
i am comfortable with class, namespace ,Sub ,Function ,Properties ...and so on. i studied about Custom Controls and Extension methods. There i found something new so called Attribute that are placed before classes and Functions definitions.[code...]
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May 17, 2012
In vb.net, this is serializable:
<Serializable()>
Class FunctionHolder
Private _F As Func(Of Double, Double)
[code].....
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Dec 15, 2011
I have connected my sql db with vb and I m trying to make a UI. My question is that when I write code in order to create datatables and I fill them with the results of queries I've created, where do these datatables belong? I'm wondering if I have to define a new dataset or do they belong to the existed dataset which is created by the dataset configuration wizard??
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Nov 30, 2010
How do I limit an Interface when defining it? What is the correct technical term for what I am describing?For example, I want MyInterface to only be implemented for objects that implement IList(Of T) and ICollection(Of T).
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May 12, 2012
I am working on a project right now which requires the program to read names from a text file and add those names to a list box(after the program is launched). After they are added to the list box, the user is suppose to vote on the items in the listbox(each click of the vote button should add a +1 to the counter for that name selected). So far I have been able to bring items from the text file into the list box, but am unable to set up the voting system.
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