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I used dataset and sqldataAdapter to retreive data from the sql database ,
I want to make few column of the database which are shown in the datagrid to be read only .
how can i do this ?
And which event should i use in order to validate the datagrid's entered data for each cell, and how it can be done?
Rajwant Mishra
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I want to make few column of the database which are shown in the datagrid to be read only .
how can i do this ?
--->Use this : grid.Columns(2).ReadOnly = True
--->U want to specify the column number here.
And which event should i use in order to validate the datagrid's entered data for each cell, and how it can be done?
--->Use CellValidating event in the datagrid property.
Janani
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i am using vb.net 2003 it is not there with this vb.net
I can use this event with datatable.column(index).readonly=true
but i am not able bind the datatable directly as i am fetching data from two table and giving the datagrid direcly using the dataset, by using datatable first i have to set it`s datasource to the result obtained by the query , and then i have to set the source of datagrid to datatable but i am not able do this with my app. it does not give any error but result in grid is empty....help lsss here...
again that cell changing event is also not here ,i want to validate each entry before filling it into the database so which is the right way to do this ? is there is any way in which i can achive my goal?
Rajwant Mishra
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Hi,
I am working on what is, I suppose, a fairly ambitious project for a newbie!
As you can guess, I have hit a snag and would like some easy-to-follow assistance, please.
My program is for input of some information, storing this in a database, then using the information to build 4-point graphs in child windows when selected from a ListBox. The Row ID is gained from the ListBox Item selection, enabling identification & retrieval of the relevant data to build the graph and other data into a "template" child Window, which is then displayed.
All works great until....
A number of graphs need to be selected for display as comparisons. Clicking several items in the ListBox opens several Child Windows. They each open correctly BUT, from Graph 2 onwards, as each is opened, the previous graphs automatically change to the current item's data. As a result I end up with all graphs & info being exactly the same.
How can I ensure that, after creation, a Child Form accepts no further input, is immobilised, becomes inert, freezes its content,or whatever?
I have not found anything that helps me through this dilemma. Can you help me find the solution?
Many thanks.
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You haven't come acrossed any information about this problem because it's a desgin flaw in your application. There is nothing that will stop a form from accepting input, at least in the form that your thinking about.
Basically, you have to change your child forms so that they are not dependant on data from outside of that form. Each child form should be operating on a COPY of the data it is graphing, not depending on an outside pointer to tell it what data to get. This is because that pointer can change, as is evident from your other forms showing the exact same graphs.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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How to close window on buttonclick.i used self.close();
but not working in firefox i need in firefox.
Thanks,vin1070
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vin1070 wrote: but not working in firefox i need in firefox.
Does FireFox have a built in VB.NET interpreter?!
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vin1070 wrote: Urgent
Noone cares. If it was that urgent, you'd be Googling it 'till your fingers bled.
And what does this have to do with VB.NET?
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Dave Kreskowiak wrote: If it was that urgent, you'd be Googling it 'till your fingers bled
Dave Kreskowiak wrote: what does this have to do with VB.NET?
Got me on that one
Some people have a memory and an attention span, you should try them out one day. - Jeremy Falcon
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I am creating a remoting application which should be avaliable from IIS to different clients.
Now the problem is that when i choose HTTP channel then i have to stop IIS as remoting permits only one process to access port 80
Second when i tried using TCP channel it gave me socket exception while trying to access object from internet
How can i make sure that my objects are avaliable remotely over HTTP or TCP without stopping IIS.
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The only solution you have is a Web Service. It runs as a website on HTTP, port 80, or whatever other port you want.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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You might be right but then on CodeProject and Microsoft I have seen that a dll is transferring data through remoting over using HTTP over IIS.
I am trying the same but not been able to sucessfully implement it.
Also there are pilot project going on which are using remoting to transfer data.
one such project is CABANA
http://www.ideablade.com/cabana/cabana.html?=msp&p[^]
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Considering you can't have two different processes (IIS and a remote object) listening on the same port... good luck! A Web Service is a form of remoting, over HTTP.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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i want to drag and drop a user control to a program out of my application.
how?
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That's not really going to work. You may be able to inject the control itself onto a form, but it's not going to be stable, or integrated to the form.
Why would you want to do this ?
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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ive got some objects on my form that they have some data in their classes.
i just want to view this data in another application like excell using drag and drop method.
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Hi ,
I am writting an application in vb.net .while debugging
this application i am getting following error
Error 7 Unable to resolve type 'C1.Win.C1FlexGrid.C1FlexGrid, C1.Win.C1FlexGrid, Version=2.5.20044.189, Culture=neutral, PublicKeyToken=c9c7ad9c0a5706c9'
Can anyone tell me what r the possible reasons for this error?
Prashant
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I would guess that a dll is missing ? Are you usung a control with this name anywhere ?
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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I'm having some trouble when opening files, .txt files open fine, but when the program trys opening anything else it will only open a few characters, if anything at all. Opening the file and saving it as .txt causes it to open fine, but just renaming the file does not. The code is as follows...
Public Function ReadStream() As String
Dim Stream As IO.FileStream = New IO.FileStream(OpenDialog.FileName, IO.FileMode.Open)
Dim Reader As IO.StreamReader = New IO.StreamReader(Stream, System.Text.Encoding.Default)
Dim value = Reader.ReadToEnd()
Reader.Close()
Stream.Close()
Return value
End Function
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It's not working because your code is treating all files as text files, which won't work, as you found out, with binary files.
This[^] should help clear things up a little bit...
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Okay everything loads properly into a Char() Array, but when converting it to a string certain characters are left out. New code is...
Public Function ReadStream() As Char()
Dim Stream As IO.FileStream = New IO.FileStream(OpenDialog.FileName, IO.FileMode.Open, IO.FileAccess.Read)
Dim Reader As IO.BinaryReader = New IO.BinaryReader(Stream)
Dim Size = New IO.FileInfo(OpenDialog.FileName).Length
Dim Buffer(Size) As Char
Buffer = Reader.ReadChars(Size)
Reader.Close()
Stream.Close()
Return Buffer
End Function
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That's the whole point, you can't convert a binary file into a string.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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i want to know about to create a menu like file,edit,....etc, in javascript.
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So why are you asking on a vb.net forum? Ask on an asp forum.
Posted by The ANZAC
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As has been said, this is the wrong place. The web dev forum seems best, but google is even better, there are tons of the things out there for download.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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