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I need to send a file from a visual basic to a device through a RF modem using a rf232 connection. Where would I look to find how to open the Com port?
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I am attempting to populate a ComboBox on a Windows Form. Under the properties I have set the DataSource, DisplayMember and the ValueMember. This does in fact display each row of my data. What I would like to change are the following two things:
1 - I do not want a default value, when I run the form it displays the first row of data. I would like this to be blank.
2 - I think it would be better to do this by code instead of through the IDE. Currently, I have a added an OleDbConnection, an OledbDataAdapter and a DataSet through the IDE (they appear at the bottom of the IDE window). They are configured through the properties for each but again, I think it would be a better practice to do this through actual code. Can someone point me in the direction of a good tutorial for doing this. I am using an Access2003 database.
Thanks,
Dan
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If you data bind a control, it will select a value, it can't be blank. You'd have to add a blank item to the list.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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This is how you can do it:
'Populate ComboBox.
ComboBox1.DataSource = myDS.Tables(0)
ComboBox1.ValueMember = "ColumnName"
ComboBox1.DisplayMember = "ColumnName"
'Add a blank row.
DR = myDS.Tables(0).NewRow
DR(1) = ""
myDS.Tables(0).Rows.Add(DR)
'Initially show blank row in ComboBox.
ComboBox1.SelectedIndex = ComboBox1.FindStringExact("")
"Okay, I give up: which is NOT a real programming language????"
Michael Bergman
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Thanks for above code. It works just the way I would like it to.
Dan
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Hello everyone, I am currently running VB.Net 2005 (to and Access 2003 MDB) and setting up a Crystal Report using the versions of Crystal that came with the program.
In my program I have a field where the user can put in a person’s height in inches. But when I run my report I need to show that value as ‘X ft. X inches’.
I can’t find a built in function in Crystal that will do this (like the built in function to calculate someone’s age). Does anyone know if there is one or if there is another way to do this with a formula field or something?
Thanks for any help that you can give me with this.
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Last time I checked, there were 12 inches in a foot. Divide inches by 12, drop the remainder. There's your feet. Modulous the same number of inches by 12 and you've got the remaining number of inches.
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Hey Dave, thanks for the reply.
(You are right, the last I checked there were 12 inches in a foot as well. AND the last I checked there are 52 weeks and 365 days in a year, but Crystal still has a function for finding the exact age of someone based on their Date of birth to make our lives easier)
1. So there are no functions that will do this automatically? Or do you know?
2. What is Modulous?
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CCG3 wrote: What is Modulous?
Clickety[^]
I think I'm going to call my next project "Chuck Norris". It's a sure way to guarantee it's unbreakable.
• • •
But fortunately we have the nanny-state politicians who can step in to protect us poor stupid consumers, most of whom would not know a JVM from a frozen chicken. Bruce Pierson
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Here's a better, more helpful link[^].
Hope that's clear now.
I think I'm going to call my next project "Chuck Norris". It's a sure way to guarantee it's unbreakable.
• • •
But fortunately we have the nanny-state politicians who can step in to protect us poor stupid consumers, most of whom would not know a JVM from a frozen chicken. Bruce Pierson
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Why does something so simple have to be prewritten? Why not just create a calculated field and get what you want in 10 minutes?
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Dave Kreskowiak wrote: Why does something so simple have to be prewritten? Why not just create a calculated field and get what you want in 10 minutes?
Well Dave, you have to understand that some of us are newbies and we are looking for help. I have never heard of a 'calculated field' nor do I know how to create one. If it is so simple can you help me set one up? Or give me a example of what one is? (you are talking about creating this in Crystal right?)
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CCG3 wrote: I have never heard of a 'calculated field'
Allow me to quote from your original post:
Does anyone know if there is one or if there is another way to do this with a formula field or something?
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Ok, so are you saying that a 'calculated field' is the same as a formula field?
If so, then can you show me an example of how this can be done with a formula field?
-- modified at 9:44 Friday 29th June, 2007
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CCG3 wrote: f so, then can you show me an example of how this can be done with a formula field?
Nope. I don't have any example because I don't use Crystal Reports.
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Hi, is it possible to make password character in windows form like in web form?
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Obviously, you haven't noticed the PasswordChar property of the TextBox control.
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hello frnd,
try to use "PasswordChar" property of textbox you can put any char as password char
regards,
koolprasad2003
Be a good listener...Because Opprtunity knoughts softly...N-Joy
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You just repeated what I said about 20 hours ago. 
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I'm writing a device application that runs on Windows CE. The report items are not available in the solution explorer with this type of project. What options do I have?
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The .NET Compact Framework doesn't supporting printing. You'll have to use a third party solution to do this. I think HP has one, but I don't know what it's called.
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i am using dotnet 2003.i want to move records using firstbutton,previous button,next button,last button in vb.net windows application(not web application).
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Do you mean moving within the record index or moving a record within the index?
I think I'm going to call my next project "Chuck Norris". It's a sure way to guarantee it's unbreakable.
• • •
But fortunately we have the nanny-state politicians who can step in to protect us poor stupid consumers, most of whom would not know a JVM from a frozen chicken. Bruce Pierson
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R U showing records in textboxes or in grid ???
regards,
koolprasad2003
Be a good listener...Because Opprtunity knoughts softly...N-Joy
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