|
Hai everybody,
Am using Vb.net as my frond end and sql server 2000 as my back end.
in one of my screen am using grid control to view the data's in the tables, my problem is i want to filter the grid data's ie sno wise filter and name wise Filter. How can i do it? is it possible ? Please Give me detail description.
|
|
|
|
|
Do you want a filter from user input or filter the data before it gets to the page?
If you are wanting to pre-filter it then I would do that with your stored procedure.
If you are looking to do this based on user input then you can set you dataset/datatable = to a dataview. Then use a Dataview.Filter = "Column = Validated user input" which is similar to SQL but only requires the WHERE (which is what the "=" means) so remember to use ' ' for characters and the exact value for numerics.
Cleako
|
|
|
|
|
Thanks Mr.Cleako
I want to filter the data's by user input in text box and then he press a button. ie am filtering employee database in that database it contains more than 600 records inthat you want to extract particular employee from that database in that case only am in need of grid filter option. in my form i used 5 controls 3 buttons and a textbox and a grid, user given his input in a text box and then press any one button ie filterby empno or filterby ename or by department in that case am using below code for on of my button press but it was not working tell me some suggestion or code
Private Sub btneno_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btneno.Click
con.Open()
str = "select * from empmaster1 where Eno='" & txtsearch.Text & "'"
da = New OdbcDataAdapter(str, con)
da.Fill(Dspay, "empmaster1")
dgv.DataSource = Dspay
con.Close()
End Sub
Grid name is dgv
Dataset name is Dspay
table name is empmaster1
in pageload event am writing code for connection
Please help me.....
|
|
|
|
|
rrrriiizz wrote: Private Sub btneno_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btneno.Click
con.Open()
str = "select * from empmaster1 where Eno='" & txtsearch.Text & "'"
da = New OdbcDataAdapter(str, con)
da.Fill(Dspay, "empmaster1")
dgv.DataSource = Dspay
con.Close()
End Sub
If you are allowing them to type anything in the textbox then you should change your SQL to be "LIKE %'" & txtsearch.Text & "'%" instead. I would also suggest you not directly use the textbox text but set it to a variable and pre-validate what they typed because this can lead to a SQL Injection Attack by them typing in the correct commands.
Cleako
|
|
|
|
|
Mr.clicko
This command also not working Please help me
is my code is right? am n a great trouble with this filtering for past one week....
|
|
|
|
|
The "LIKE" does not work either? Have you tried typing something in that you know for sure is present?
Private Sub btneno_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btneno.Click
con.Open()
str = "select * from empmaster1 where Eno='" & txtsearch.Text & "'"
da = New OdbcDataAdapter(str, con)
da.Fill(Dspay, "empmaster1")
dgv.DataSource = Dspay
con.Close()
End Sub One thing that I would suggest is to convert the Eno column to a varchar if it is currently a numeric column. I do not know if that is your DB setup or not but it's worth a try.
Select * FROM EmpMaster1 WHERE CAST(Eno AS VarChar(30)) LIKE %'" & txtSearch.Text & "'%"
Cleako
|
|
|
|
|
Mr.Cleako,
this is also not working cause am trying to get the values for Particular Employee name also. but it is also not working. thanks for your supports and help for past four days am not able to browse. thats what Late reply. if there is any other Method or technique is there for filtering please tell me and also code or syntax. Please Help.....
Thank You
|
|
|
|
|
First just try opening Query Analyzer and try something like this but replace "value" with something real.
Select * FROM EmpMaster1 WHERE EmployeeName LIKE '%value%' and if that works just translate it into something you can put into the code. Do the same for the number filter but you will probably need to do the cast to varchar in order for it to match if it is stored in the database as a number.
CleAkO
|
|
|
|
|
how to go through in data table data????????????????
Thiwa
|
|
|
|
|
foreach (DataRow row in table.Rows)
something like that
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
|
|
|
|
|
 hi,
I have problem plssssssss give a solution of:
1. how can read Excel file using dialogbox?
2. How can get sql database n tables in to combobox or listbox
3. How can we refresh datagrid when we add new record in to database  
c.p.desai
|
|
|
|
|
Why the bold font ?
chaiotali wrote: how can read Excel file using dialogbox?
you can't. A dialog box has nothing to do with it. You need to use the Office toolkit to talk to Excel, and it works the same, no matter what the UI.
chaiotali wrote: How can get sql database n tables in to combobox or listbox
You can do a select to get a list of the tables, then you can make that the datasource of your control
chaiotali wrote: How can we refresh datagrid when we add new record in to database
You can't, really, your database cannot send messages to your app.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
|
|
|
|
|
I want to be able to insert at a particular place in a linked list. Im sure this is possible but how do u do it.
I can cycle through the linked list and find the position i want to insert but then how can i insert into this position.
Does anyone have any code examples.
Im using vb.net
|
|
|
|
|
What linked list are you using ? Isn't there an InsertAt method ?
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
|
|
|
|
|
This is actually a VB6 question. I'm trying to set up a VB DLL so that if it can't instantiate an external COM object because it is not registered properly it would run regsvr32.exe against the DLL to register the object and then try to instantiate it again. I'm using CreateProcess to run regsvr32 against the DLL and the problem I'm running into is that when the CreateProcess method is invoked, regsvr32 generates a dialog box indicating that LoadLibrary can't find the specified module. The module it prints out is the correct path to the DLL. Does anyone know how I can get this working?
|
|
|
|
|
I'm not sure, but it sounds like you're passing in a path to the .DLL that includes spaces. You'll have to enclose the path in double quote marks so the command line you pass to CreateProcess looks more like this:
REGSVR32 "C:\Program Files\Folder\Some Folder\MYDLL.DLL"
If not, RegSvr32 will look for a file called "Program" at the root of C:, not MYDLL.DLL in the path you want.
To build the path string with quote marks inside it, you have to use 2 quotes to get 1:
Dim path As String = """C:\Program Files\Folder...MYDLL.DLL"""
Dave Kreskowiak
Microsoft MVP - Visual Basic
|
|
|
|
|
I am but I am enclosing the path in double-quotes. I found this out the first time I tried it without double-quotes. Regsvr32 complained about not being able to find the C:\Program component.
What I found was that I could set up an console app built in Visual C++ to do this and it worked fine if I ran it from the command line. But if I called the Visual C++ executable from my VB app, it gave me the same error. It looks like it has something to do with trying to run regsvr32.exe from a VB instantiated thread.
|
|
|
|
|
I never had a problem running RegSvr32 from VB6 or VB.NET. Since a process gets it's own seperate thread, regardless of which thread you create it from in your app, I don't see how this would cause a problem. Hmmm... Are you running multiple copies of RegSvr32 at the same time? (grasping at straws here...)
Dave Kreskowiak
Microsoft MVP - Visual Basic
|
|
|
|
|
I'm just setting up the command line in a string and passing the string to CreateProcess like this:
Dim cmdLine as String
cmdLine = "regsvr32.exe " & Chr(34) & "C:\Program Files\ProgramFilesFolder\DllFilename.dll")
I'm passing a NULL string for the application name, a NULL for the process attributes and thread attributes, not inheriting the handles, NORMAL_PRIORITY_CLASS for the priority class, NULL for the environment pointer and current directory, and pointers to a startup info and process info structure with just the sizes set in both. Should any of these parameters on the CreateProcess call be set differently?
|
|
|
|
|
Sorry. In the previous example I should have added the trailing Chr(34) for the ending set of double-quotes instead of the end paren.
|
|
|
|
|
I'm not running multiple copies of regsvr32 that I'm aware of. The only thing I can think of that would cause problems is that the process that I'm invoking regsvr32 from doesn't have admin privileges. However, I can set up a test app using VB and run it from an account that I know have admin privileges and I get the same results. If I set up a Visual C++ app that does the same exact thing as the VB test app, it works perfectly.
-- modified at 12:37 Monday 5th March, 2007
|
|
|
|
|
As an alternative to regsvr32, you could (pinvoke) call the DllRegisterServer function in the Dll. Regsvr32 executes this function in the Dll to perform the registration.
|
|
|
|
|
Hey
I have inherits the Textbox-control but i'm
having problem with my properties that i have added.
this is the class with the property added:
Public Class TPTextBox
Inherits System.Windows.Forms.TextBox
private _blndirtyEnabled as boolean
Public property DirtyEnabled as boolean
set (byval value as boolean)
_blndirtyEnabled = value
end set
Get
return _blnDirtyEnabled
Get
end property
end class
now i want to edit the value through the "properties"-window in designmode to "true"
but it always returns to "false" when i try to save the Form that i have dragged the control to.
in the designer file the form has put this line:
me.TextBox1.DirtyEnabled = false
i want it to store the value that i have changed it to but it always return to "false".
i have removed the line but it wont work.
whats is wrong
|
|
|
|
|
Odd, I tried it and didn't have any trouble. Did you try changing that line so it sets the property to true, instead of just removing it. Also you might want to try using the control in a new project to see if the problem persists.
|
|
|
|
|
<defaultvalue(gettype(boolean), "true"),="" category("appearance"),="" description("")=""> _
Public Property DirtyEnabled() As Boolean Implements Interfaces.IDirtyTracking.DirtyEnabled
Get
Return _blnDirtyEnabled
End Get
Set(ByVal value As Boolean)
_blnDirtyEnabled = value
End Set
End Property
i forgott to mention that i have this above the "property"
<defaultvalue(gettype(boolean), "true"),="" category("appearance"),="" description("")=""> _
when i removed it it worked fine.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
