Runtime Variable Field Selection In Code Behind?
Jan 23, 2012
I have a list with several fields that is created from dataset from a linqtosql query. At run-time, the user gets to specify what field he/she wants to display from the list. In other languages, I can dynamically do this like:
valueIwant=mylist(i).[fieldnameImInterestedIn]
Where 'fieldnameImInterstedIn is itself a variable. How do I do this in VB.Net?
non-working actual code follows:
Dim patientdata = (From patientvar In pdfdatacontext.tbPatients Where patientvar.PatientID = patientid)
Dim patientlist = patientdata.ToList()
fieldvalue=patientlist(0).(reportrow.userselectedfieldname)
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Dec 31, 2009
What i am tring to do is execute certain code based on a variable held in a module someting like compiler directives, here's an example for lack of an explanation.[code]...
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May 18, 2012
Public Class Form1
Dim x, c, number(0 To 19) As Integer
Dim s As Integer
[CODE]...
The variables in the brackets [example] do not actually have brackets in them in the original code. These are where the issues are. For both variables, it says, "The type for variable [variable] will not be inferred because it is bound to a field in an enclosing scope. Either change the name of [variable], or use the fully qualified name (for example, 'Me.[variable]' or 'MyBase.[variable]')." Now, I'm not entirely sure if this is a stupid question or not, as I'm used to VB '98 because that's what we use in my programming class at High School. let me know why this won't work.
-Note: The intention of this program is to continually loop the generation of numbers for this list until I tell it to stop. Button1 ends the program, Button2 generates the list one time only, Button3 is supposed to loop the generation of the list, and Button4 is supposed to end the loop, but not the program.
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Nov 1, 2009
I use Microsoft Visual Basic Express edition 2008 on my Windows XP SP2 and in it, in a Windows Form project, I add a button to my default form and set it's flatstyle to flat and borderwidth to 0. At runtime, when I click that button, I get a black color hollow box on that button at it's center...
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Oct 22, 2011
Private Sub ListOfCrops_SelectedIndexChanged(sender As System.Object, e As System.EventArgs) Handles ListOfCrops.SelectedIndexChanged
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Sep 10, 2009
for an application, I generate RichTextBoxes during runtime with the following code. The code generate a new node in Treeview under parent node "Notes".
Dim RichTextBoxCounter As Integer = TreeView_MainForm.Nodes_("NodeNotes").Nodes.Count
Dim NewNote As New RichTextBox
NewNote.Size = New System.Drawing.Size(845, 550)[code].....
Now, I want to show the RichTextBox if the associated child node is selected. I tried the code below, but it does not work.
If TreeView_MainForm.SelectedNode.Text = "Notes" Then
Dim NewNote As New RichTextBoxPrintCtrl
If TreeView_MainForm.SelectedNode.Parent IsNot Nothing Then[code]......
provide the code to display the RichTextBoxes after selecting the node.
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Jul 31, 2009
I am trying to convert a value from a radio list box that is populated by an access database. The database loads fine, I have no trouble with that. My issue is that I am trying to take the value of the radio button chosen and turn it into a font color. Therein lies my problem. I see that it cannot be a string, but when I turn it into an object, I get an error. I will note that I am using VS 2008 (Windows Vista x64), and the database is compatible with a 2002 - 2003 Access database. I am using ASP.NET for my programming, however, I am trying to program it in VB. This is my code:
[Code]...
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May 16, 2010
At design-time, when one clicks a control it is selected and this state is depicted with a frame drawn around the control. I would like to know how can I mimic the same effect at runtime; that is, how can I draw a similar frame around a control when the user clicks over it?
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Jul 5, 2009
I have a form in whcih users will be able to select the required field that has to be printed.. can u tell me how to add field in CR at runtime ?
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Dec 12, 2010
the problem - i have a list box, which i use to display info (obvs) but when i click on one of items in the list when debugging, i wondered if there was a way to store which one was selected in a variable?
dim selected as string
selected = 'vb variable for a click?
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Oct 10, 2009
Lets say I have declared an array by doing:
dim array()
Also have a variable:
dim loopsize = 10
Then i do this:
for loop = 1 to loopsize
array(loop) = 5
next
What i wanted to do with this is from array(1) through to array(10), the values will be changed to 5. But vb will not allow this and crashes.
Why doesn't this work and how can i make it work?
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Aug 7, 2011
I'd like to adjust Report field height at run time.In the 2nd image, at the 3rd and 4th row of "Wine" column, if the data length is enough for a line, I'd like to adjust its height into a line (And also bottom line object be followed by it). Otherwise, let it be two lines. Please share me which property I'd set.
PS: In page header, I use box object. But in Details section, I just use line object because in report footer, I need to show Total amount. If I use a box in these three sections, there is the box is expanded the whole page without having detail rows at the last page.
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Nov 24, 2010
I have a single columns table which holds 50 records. I would like to create 50 buttons from those records. How can I do that in Vb.Net?
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Mar 5, 2011
sir i've one text field and two tables named table1,table2
i've to just display text from two different tables using two different navigations for each table.
1.when i'll click on first navigation, data from first table should have to display in textbox
2. when i'll click on second navigation, data from second table should have to display in same textbox alternatively
i've to show data in only one text box alternatively
i've binded designtime table1 to textbox
so how to unbind it & bind table2 to same texbox runtime.
like that i've 12 tables & 12 navigation for each table and only one text filed
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Sep 19, 2011
I'm new to programming and would like to know how can i create radio buttons at runtime using the field values in my sql database. Im creating a survey application.(windows forms)in the relational database i have 2 tables one for questions and one for options.
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May 11, 2010
I'm new with vb.net my problem is how to assign field value from database to a variable here is my code
Call connectdatabase()
dim uname as string
dim pass as string
Try
sql = "SELECT * FROM user;"
command.Connection = conn
[Code] .....
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Feb 27, 2010
I simply wont to read one field in a databasetable into a variable.[code]....
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Apr 25, 2012
I'm having trouble tracking down what is wrong and causing the above error. This only occurs when saving the design view in VS 2012. The code builds and runs fine.Full error text:Code generation for property 'CompanyValue' failed. Error was: 'Property accessor 'CompanyValue' on object 'ContactViewUC1' threw the following exception: 'Object variable or With block variable not set."
CompanyValue definition in ContactViewUC:
Public Property CompanyValue
Get
[code].....
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May 25, 2011
im using many variables in my project however, they are most of the time used for 1 or 2 things, so having them loaded up like that forever sounds not very good for performance.Is there a way i can remove a variable after i no longer need it?
for example:
private sub button1_click() handles button1.click
dim result as integer = var2 + var1 / 2
[code]....
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Oct 6, 2010
I'm trying to populate some file dependant settings from the database. Values I can add no problem but how to set the names as they differ from datafile to datafile?
For Each myRow In SetModDataTbl.Rows
Dim SettingName As String = myRow.Item(1)
Dim SettingValue As String = myRow.Item(2)
'>> SettingName = SettingValue <<
Next myRow
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Feb 8, 2011
I just started using VS2010. I am very familiar with Visual Basic 6 and was very comfortable with it.I was able to take a variable and assign a database field to iwithout using data binding. I can't seem to figure out how to do thatin VS2010 What I am trying to do is have the use enter a password to gain access to the program. The password is stored in a database so that the user/owner can change this password to suit their preference.
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Mar 17, 2009
Upon entry into my database, frmLot opens. The form opens in datasheet view. It displays several fields to include one named WorkOrder. The user clicks in the cell named WorkOrder. In the On Click property, I store that variable and name it stWorkOrder. What I need to happen then is to pass this variable to the criteria field of a query named qryWorkOrder and have it run and display results.
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Jan 15, 2011
In Visual Studio 2010 is it possible to check the state of variables during run time. When a run time error occurs the error is highlighted and you are able to mouse over different variables to see their values when the error happened. I would like to do something similar except without the error.
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Oct 30, 2009
I am trying to create a number of objects depending on the width of a row of an array, is there a way I can change the name of the variable being Dim 'd as I don't know how wide the array will be.
I have been trying something along the lines of:
pseudocode
For x as integer = 0 to UBound(MyArray,2)
Dim Object & CStr(x) As Object Type
Next
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Jul 16, 2009
global variable can be created during runtime?
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Jan 26, 2009
I'm multiplying X*Y*Z in a loop of 200 interations Y is declared as a constant. A timer can cause the loop to pause for 10 seconds.
During this 10 sexond pause I would like to change the value of Y. It needs to be changed only for this run, not a permanent change which can be done in the declaration.
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May 14, 2009
I have a third party dll. I wish to create a variable to reference to one of the variable in it.so that the value in the class change, my value also change. The senario can be reproduce from the code below.For the code below i wish to get the form to display 2 instead of 1. How can i make my variable test2 always referencing test.testValue?
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Apr 5, 2010
How can i declare a simple variable in a form that is the count of the amount of times a field appears in a database.Basically i want to count the amount of times the word "Saloon" appears in a column in my database (access 2007) and then assign that value to a variable.
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Mar 26, 2009
How do you code selection of text within a RichTextBox. I tried the following code and nothing happens.I would think this should select all text within the RichTextBox.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.RichTextBox1.SelectAll()
End Sub
I would think this would select text from a start point to an end point.
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
ss = Convert.ToInt16(TextBox1.Text)
se = Convert.ToInt16(TextBox1.Text)
Me.RichTextBox1.Select(ss, se)
End Sub
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May 31, 2011
When I scroll down to the function shown below, and right click Analogues - go to definition it takes me to the top of the file, and lands on top of the
[Code]...
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