Validating date in vb net


14-Jul-2017 02:48

[Code explanation] On the button click procedure write the code to create an object of Text Box class, and set the properties like name, Size and location, and then we add this control to Group Box control with the help of Controls.

Add() function.[Create Dynamic Label][Add event at run time]From the above we create controls at run time and now we move to next step- create event handler at run time and attach that event to the control.

The example code uses "Text Box1" and "Combo Box1" rather than the names of the controls you're actually using. Very few, so it will take very little effort to find them. | MSDN Data Walkthroughs VBForums Database Development FAQ My Code Bank Submissions: VB | C# My Blog: Data Among Multiple Forms (3 parts) Beginner Tutorials: VB | C# | SQLPublic Class Form1 Private Sub Loan Text Box_Validating(By Val sender As Object, By Val e As System.

Set Error(Loan Text Box, _ "Please enter a loan amount greater than 0 " & _ "in numeric characters.") e. Cancel = False End If End Sub Private Sub Rate Combo Box_Selected Index Changed(By Val sender As System. The example code uses "Text Box1" and "Combo Box1" rather than the names of the controls you're actually using. | MSDN Data Walkthroughs VBForums Database Development FAQ My Code Bank Submissions: VB | C# My Blog: Data Among Multiple Forms (3 parts) Beginner Tutorials: VB | C# | SQLAll you need to do is change the names used in the Handles clauses to the names of your controls. How many places in the code do the words "Handles", "Text Box1" and "Combo Box1" appear?

Main file has a linked table (Link Table) from Link The link table store abseloute path (C:\Folder1\Folder2\Link Data.mdb") My Main file is also in Folder2 and I want to store refference path (".\Link Data.mdb") How can we change it in a) MS Access software and with b) VB. Set td = Nothing End Sub Public Function Exists Table(By Ref dbs As Database, tbname As String) As Boolean On Error Go To Oops Err Dim s As String s = dbs. Name Exists Table = True Exit Function Oops Err: Exists Table = False End Function This code is not checked!

Net at run time Reason: When I will deploy my data with my application I don't know what will be the directory. Thanks Parminder Singh Dhillon If you want to refer to a path that is in or below your program folder then just use Application. You can use this to build a connection string to an MDB file, to load an image file or open a text file, amongst other things. | MSDN Data Walkthroughs VBForums Database Development FAQ My Code Bank Submissions: VB | C# My Blog: Data Among Multiple Forms (3 parts) Beginner Tutorials: VB | C# | SQL The problem is how to change path of linked table path stored somewere (where, I don't know ? When I access Link Table in my program it will search the linked table on the path where Main stored it. Thanks Parminder I would guess that you would have to check when the program first starts up, searching the databases for the linked table paths, then replacing them with the new paths that you wish to put. But there is much better solution for this kind of problems: If the man opens an MDB then a code should run automatically first! You must run this first: If Not Cur Dir Set( ) Then Application. NET allows the use of COM-based object libraries through the Interop layer In my case I will use DAO com component.

This can all be done from a config file, reading a certain flag, then changing the flag after it is done so it doesn't have to be ran again. Quit 'We can obtain "Location of Source MDB/MDE" from command line, for 'example: /cmd Z:\DATABASES\ '(DATASRC. Add com-refference to "Microsoft DAO 3.6 Object Library" file (DAO.

If you want to validate data in your text boxes you should do it in the Validating event for each text box. Event Args is the base class from which the other types of event args inherit. Set Error(Loan Text Box, _ "Please enter a loan amount greater than 0 " & _ "in numeric characters.") e. Cancel = False End If End Sub Private Sub Rate Combo Box_Validating(By Val sender As Object, By Val e As System. See Below: Public Class Form1 Private Sub Loan Text Box_Validating(By Val sender As Object, By Val e As System.