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How can I give a "seperate" value to a specified item within the combobox? For instance, Say when the user selects "good" within the combobox, there will also be a value associated with it that will be displayed within a textbox. Thanks in Advance.
D
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I am importing the items that populate the combobox from an XML doc. Is it possible to handle what I mentioned within the XML sheet?
D
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You can create a custom class redefining the ToString() method.
The ComboBox uses the ToString() method to retrieve a string to display in the UI for each item.
<br />
class MyItem {<br />
<br />
private string name;
private string val;
<br />
public MyItem(string n, string v) {<br />
name = n;<br />
val = v;<br />
}<br />
<br />
public string ToString() {<br />
return name;<br />
}<br />
<br />
public string Content {<br />
get {<br />
return val;<br />
}<br />
}<br />
<br />
}<br />
<br />
ComboBox c = new ComboBox();<br />
c.Items.Add(new MyItem("good", "User choosed good"));<br />
<br />
<br />
ComboBox_SelectedIndexChanged(object sender, System.EventArgs e) {<br />
textBox.Text = ((MyItem)c.SelectedItem).Content;<br />
}<br />
I hope
[ITA] Tozzi ha ragione: Gaia si sta liberando di noi.
[ENG] Tozzi is right: Gaia is obliterating us.
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Thanks for the quick response. However, is there some way I could put all of the information into an XML file and pull it from that accordingly? I have most of the information in there as it is. Thanks again.
D
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When I use "c.Items.Add(new MyItem("good", "User choosed good"));" it gives me an error: Class, struct, or interface method must have a return type and invalid tokd '(' in class, struct, or interface member declaration and then Type expected where "good" is at.
I think what you gave me may work if I can fix the bugs. I may be able to pass dataset rows to "MyItem" that would populate the combobox. Any help would be appreciated. Thanks again.
D
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I got it to compile. However, when I try to read the data into the textbox it gives me an error. This is the code:
textBox1.Text = ((MyItem)c.SelectedItem).Content;
This is the error:
Object Reference not set to an instance of an object.
Thanks
D
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Can you send the code snippet or the stack trace.
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Maybe i've been a little rough... I've written the MyItem class on-the-fly directly in the messageboard. That should be only an example.
However I think it's a very strange behavior. In the code there are not evident errors... I really don't know how to help you. I'm so sorry...  
[ITA] Tozzi ha ragione: Gaia si sta liberando di noi.
[ENG] Tozzi is right: Gaia is obliterating us.
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Hi,
I want to create an application that when you connect to the internet via a dialup or broadband connection a timer will start and then work out according to you're exchange as to how much the connection cost.
Can someone please advice?
Thanks!
Illegal Operation
Making Computer Software Talk
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Well, you can easily figure out how long your own application is running using the various Timer classes available out there. If you want to figure out if the machine is connected to the internet, you'll need to run your application as a Windows service, then monitor the state of the connection. Now, I believe you'll need to use the Win32 API (via P/Invoke) to check the status of the machine's internet connection. When the connection starts, start the timer. When the connection is disconnected, stop the timer. From there, it's just a matter of multiplying the time spent online by the rate.
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Cops & Robbers
Judah Himango
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 hi,everybody.
Who understand the function of Control.SetStyle and Control.Show?
How to make tow forms in the same layer?
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dreamwinter wrote:
How to make tow forms in the same layer?
What do you mean? What do you intend for a layer?
dreamwinter wrote:
Who understand the function of Control.SetStyle and Control.Show?
AFAIK SetStyle is used to set some *graphics* bahaviors of the Control, such as DoubleBuffering, WMPainting...
Control.Show is used to show the control, for example after you called Control.Hide.
[ITA] Tozzi ha ragione: Gaia si sta liberando di noi.
[ENG] Tozzi is right: Gaia is obliterating us.
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Has a 'dataGrid1' and assign to 'dataTable1', 'dataTable1' have 3 columns: Col1,Col2,Col3, and then:
Col1.ColumnName = "Col1";
Col2.ColumnName = "Col2";
Col3.ColumnName = "Col3";
Col1.DataType = System.Decimal;
Col2.DataType = System.Int32;
Col3.DataType = System.Decimal;
Col3.Expression = "Col1 * Col2";
Col3.ReadOnly = true; // it's auto set
Why at runtime, edit Col1, Col2 of the 'dataTable1' and then leave to other row, but Col3's value has not change yet, has not any be computed？
Additional:
I had try to new a 'dataRow1', and then give value to dataRow1[0], dataRow1[1], and at last 'Add()' this row in 'dataTable1'. At this time, run dataTable1.Refresh() and found that 'Col3' shown correct. Why at this time the Expression could be used.
 
Why learn more, unaware more?
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hi to all,
does any one knows how to use graphical control in a c# win application.
i have an interface that display a planning of an employe and i want to do that graphically.
does any one knows if such control exist in c# ?
if not does someone have any suggestions ?
best regards and thanks in advance
fady
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All controls in c# inherit System.Windows.Forms.Control.
You can create such a control that draws a specific thing when you call the procedures you add to it. The question is how to draw onto the control? The answer is the System.Drawing.Graphics Class. Get the associated Graphics to you control with CreateGraphics and do your drawing, the control changes it's (visual) contnents afther a refresh.
I hope you understand...because is a rough world out there...
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Dear All,
I've one code which will convert an XML file to a MailMessage object. Now I want to save it to local disk as .MSG or .EML file. How can i do this?
Does any body know it?
Jayant D. Kulkarni
Brainbench Certified Software Engineer in C#, ASP.NET, .NET Framework and ADO.NET
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i have downloaded new Message from outlook into my local folder i have problem in displaying it in winforms(C#)
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There is string in the statement.
For example, SQL statement in C#.
strSQL="Select * "
" from TB1";
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strSQL="Select * " +
" from TB1";
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Another way is
strSQL="Select * ";
strSQL+=" from TB1";
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strSQL = @"Select *
from TB1";
works as well. It's useful for putting long formatted strings in code.
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Hallo comunity,
i create litle tool with Visual Studio .Net 2005 and with Framework 2.0 Beta and it works good, but is a beta version of framework!, but not all of systems have a Framework version 2.0, most of them have a 1.1 framework version, can i make a configuration witch framework to use when my tool is installed, or when i compile the aplication they should use the 1.1 framwork and not the 2.0, so i can install the application on everey system with 1.1 framwork, i have 3 versions of Framework, 1.0 , 1.1 and 2.0???? Maybe in a Solutionsettings or preferences or properties???
thanx for help!
mirso
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You can specify the version of the runtime required by your application in configration file in requiredRuntime element you can specify which versions of the common language runtime that your application supports in supportedRuntime
elment look at startup Element[^]
requiredRuntime Element[^]
supportedRuntime Elemnent[^]
MCAD
-- modified at 9:17 Friday 2nd September, 2005
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Hallo mcad,
thax for help, i have do this!
mirsad
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and this solved the problem or what?
MCAD
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