Is it possible to get a string form a table and executed at runtime using reflection?(.Amount > 1000) and ((.Total * 80%) >.Amount)� Amount and Total are Decimal properties of an existing class
View 4 RepliesIs there a way for a property to access its own name and type at runtime using reflection? I want to access this info without hard coding the name or index of the property in the class.
Simple Example Code:
Private ReadOnly Property MyProperyName() As String
Get
Console.WriteLine((Get Current Property Info).Type.ToString)
Console.WriteLine((Get Current Property Info).Name)
[code]....
I'm trying to create an object Of a specific type. I've got the following code, but it fails because it can't cast the new table object to the one that is already defined. I need table to start of an IEnumerable type so I can't declare is an object.
Public sub getTable(ByVal t as Type)
Dim table As Table(Of Object)
Dim tableType As Type = GetType(Table(Of )).MakeGenericType(t)
[code]....
is there a way of changing a variable type at runtime?
I have a very simple setup, single mycontrol.ascx with assoicated mycontrol.ascx.designer.vb and mycontrol.ascx.vb file.
mycontrol.ascx embeds a single reference to a custom control: "MyMenu":
<mM:myMenu id="myMenu1" runat="server" />
This has created a protected reference in the mycontrol.ascx.designer.vb file:
Protected WithEvents myMenu1 As Global.CustomControls.MyMenu
Now, when I breakpoint the Page_Load() event of mycontrol.ascx, and inspect the members returned from the type via:
Me.GetType().GetMembers()
I cannot any reference to myMenu1. If I look at the control with intellisence, the property is accessible:
Me.myMenu1
what I'm missing and what I need to do to access designer created properties at runtime through reflection?
In VB.Net how does one call a Parameterised function name retrieved from a table?
My Parameterised Function Name is below
procTextToDBTemp(Application.StartupPath & "" & strFileName)
from above function i Stored procTextToDBTemp into the SQL Table How can call that function in the Vb.net How can i do that?
I would like to know the event order of form which is executed while opening form. I am showing my form using following code and the code in form_load event executes twice. Once when the form variables are initialised and second when form is displayed. I want it to execute once only. form showing code:
[Code]...
I am developing a window application. I'm using Visual Studio 2005 and Mysql Database. The problem is, only one form is getting executed when I try to debug.I have changed the startup form to other forms(from a list of existing forms), but still that same old form is getting executed, even if I delete that form or exclude it from the project, it still keeps on executing.
Where this form is stored?(I deleted it from the folder where all other forms exist)
I have a project with 2 forms. I need the code to be executed on one form first, which is why it is run first, then I want to hide it and just display the user interface form. I have the following code, it makes both forms appear, but I only want the user display form to show: [code] I call both these subs in the frmLoad of the Processing form.
View 3 RepliesI have a database that has two tables in it. One is a table of items (table1) and the other is the table of current items (table2).On form load I need to generate a random amount of the items from table1 and populate table2 with them. I was trying to do something like this:
[Code]...
i got this window is in an mdi form and the form_load event is not fully executed, im on window 7 x64 VB 2008. Here is the code of the form load event
Private Sub frmGestion_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
bd.connexion("TacoBD.mdb") bd.ChargerDataset("tblModelAutoLuxe", "SELECT * FROM tblModelAutoLuxe") For ctr As Integer = 0 To bd.dsTaco.Tables(0).Rows.Count - 1 lstVehiculesLuxe.Items.Add(bd.dsTaco.Tables(0).Rows(ctr).Item(0)) Next bd.ChargerMarques("tblModelAuto") bd.Deconnexion() For ctr As Integer = 0 To bd.dsMarques.Tables(0).Rows.Count - 1
[Code]...
I want to add some action to my form when it is closed by clicking on the "X" button in the upper right corner of the form.How is this done? I suspect that i must add a handler for some event, but which event is it?
Currently i am using the closing event, but i dont get it to work properly.
I have a problem concerning the Form_Loading event: When I want to load a new Form (ImageDisplay) the ImageDisplay_Load Event is not executed first.
Instead it runs through the global variables definitions and then executes a Private Sub called numericupdown1_changed.
The numericupdown1 field is part of the form I want to load and has not been touched.
That is my calling sequence:
Private Sub Dispalydata_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Dispalydata.Click
Dim myDisplay As New ImageDisplay
[Code]...
The strange thing is that for other forms in my code it works well and starts with the form_load function.
I have searched everywhere, and have not found an answer. I would like to know how to enable your form to detect if a process is started. Something like this:
If Process.Start("Process.exe") Then
MsgBox("Process is running")
Else
MsgBox("Process is not running")
End If
Is there a robust way to get a constructor with string parameter by reflection?I have no choice, but instantiate a class without knowing if the constructor belongs to it, a base class, or come intermediate class in the inheritance chain.
View 1 RepliesWhat I wanted to do was, given the table name (as string), use reflection to instantiate the get method for specific fields (defined as properties with Get and Set methods.
Public Property VC60() As String
Get
Return _VC60
[code].....
The documentation for an API I am using explicitly says that I need to call close() on an object when I am done with it. I would also like to log something there.I understand GC, might not happen at expected time, etc. etc. I still want to implement some code at cleanup.I read that I need to Override Finalize() to do this.I wrote a console app to test and it looks like it indeed works.However, this does not work with windows forms. I put a break point and it never gets hit in the Finalize method.How do you add some code to be executed at cleanup time for a window form?Here is my console app test:
Public Class Foo
Public Sub New()
Console.WriteLine("In Foo Constructor")[code]......
I have 2 textboxes one for datetime picker and another for entering the name. i waant to make the datetime textbox invisible when the form is executed & when i press save the data from both textboxes should be saved into the database.
View 3 RepliesI used to write this:
Private Sub Example()
Static CachedPeople As List(Of MyApp.Person)
If CachedPeople Is Nothing Then
[code]....
But then wondered if I could reduce this to:
Private Sub Example()
Static CachedPeople As New List(Of MyApp.Person)
...rest of code...
End Sub
will the "New" bit only be executed once when the function is first executed but in the next call, it will already exist.
I am using Reflection with VB.Net to get all the forms in a list box and all controls in another list box for the selected form in the first list box for any selected Assembly from any location.
On selection of any form and clicking the 'Open Form' button it opens that particular form in disable state.
But it throws exception as connection could not established(seems the load event of the form still fires which is not desired).
So now i want that the form should load in disable state without firing any event of it and also if any of the control will be selected then it will be highlighted in the form with a red border.
I have a main form, a separate plugin interface dll and another separate dll. Now this is my problem:I'd like to access the properties of the controls of the main form for manipulation in the other dll.
Example:
MainForm
Plugins.dll
Data.dll
Main form have label control I define properties in the interface Plugins.dll from Data.dll I load Plugins to read the label control from the mainform.The question is how can I do that?
I have 9 tables with state information in them. They all have the same field names. I have a Crystal Report that is based on one of them. I want the user to be able to select a state and change the Crystal Report to use that table instead of the one it was based on.I mean when user select text in combo box and then click on "OK" then report show (using only one rpt for all the tables of same fields).
View 2 Replieshow to create tables at runtime? Or if it is a long story, kindly direct me to a site where I can learn more...
View 8 RepliesI have 6 to 7 tables with state information in them. They all have the same field names. I have a Crystal Report that is based on one of them. I want the user to be able to select a state and change the Crystal Report to use that table instead of the one it was based on.I mean when user select text in combo box and then click on "OK" then report show (using only one rpt for all the tables of same fields).i have the database name"Rajab" in which the all the tables have same fields and structures now the problem is that i have designed an rpt now i want that if user select any table from the list of combo box then through this rpt the data of every table shows. how can i use that rpt for every table because i don't want to use seperate rpt for every table i want to use only single designed rpt for 6 to 7 tables.
View 2 RepliesI want to create an access table at runtime. It happens that my table has to change, this means that i need to alter some or all of the fields. I need to be able to do this at runtime. I am using the following code, but it does not seem to work. The last field has to be an Autonumber field.
Private Sub CreateLessonPlan() '' Create table if it does not exsist
If con.State = ConnectionState.Closed Then
con.Open()
End If
Try
' Drop the Employees table if it already exists.
[Code] .....
Is it possible to alter the structure of a table that already has some records in it?
I'm developing an application to allow engineers to conduct simple single table/view queries against our databases by selecting Database, Table, Fields.
I get how to use the Dynamic LINQ Library Sample to provide for dynamically selecting the Select, Where and Order by Clauses at runtime but I'm at an impass on how to allot for table choice.
Is there a way to provide for dynamically selecting the "from" table at run time
EDIT
So Both of the answers seem to be saying the same general Idea. I'm going to try to convert the C# into VB and get it to work.
The first answer converts to
NotInheritable Class DataContextExtensions
Private Sub New()
End Sub
[Code].....
I have a large form that is set up from master-detail datasets in Visual Studio 2008.I havene master table with a large amount of detail tables. Several of the detail tables also have detail tables linked.Now I need to add a master table that sits on top of my existing master table making it a detail table.
View 7 RepliesI am using Visual Studio 2010 and SQL Server 2008. I made one preject using Employee table and Employee_Permission Options(Yes/No/Override/Never). I want to both table in form detail view most using combo box. if I used Employee detail view and Employee_Permission Datagridview than its work fine to add/edit/update but if table Employee_permission I used detailview (all Combobox) than I can not add/edit/update records. I can add only employee but can not add record in employee_pemission. I have relationship with two table EmpID in both table Primery key with auto increase in Employee table.
View 1 RepliesIs it possible to reload a form of the running application from one computer when I executed a function from my other computer with the same application? co'z I want to see the changes of data on my datagrid view?
View 2 RepliesI am having two tables with a similar structure. I want a code to select data from one table and update the same in second table and then delete the records in the first table.
View 6 RepliesI'm writing a windows form application using vs2008. I need to connect to different SQL server express database files during runtime. There is a "how to do" video showing a technique for this
[Code]...
and then in the Form1_load sub and before calling the data adapter to fill data, insert codes below:
Dim strConnectingSting = NewConnectionString
My.Settings.RunTimeConnectionString = strConnectingSting
The method works but only for the first database. I found once adapter.fill is called and the connection to a database is established, the connection can't be changed.To do what I want, I have to create a startup project to call my main project. When I want to change connection, close the main project and start again.