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Hello, i made this click event for a form, which stores and then divides a name in 3 seperate vars i.e. John C Sharp, to "John", "C", "Sharp".
here's the code:
private void btnParse_Click(object sender, System.EventArgs e)<br />
{<br />
string strFullName;<br />
string strFirstName;<br />
string strInitial;<br />
string strLastName;<br />
int intLocation1;<br />
int intLocation2;<br />
int intLength;<br />
<br />
strFullName = txtName.Text;<br />
<br />
intLength = strFullName.Length;<br />
intLocation1 = strFullName.IndexOf(" ");<br />
intLocation2 = strFullName.IndexOf(" ", intLocation1 + 1);<br />
<br />
strFirstName = strFullName.Substring(0,intLocation1);<br />
strInitial = strFullName.Substring(intLocation1 + 1);<br />
strLastName = strFullName.Substring(intLocation2 + 1);<br />
<br />
lblFirstName.Text = strFirstName;<br />
lblInitial.Text = strInitial;<br />
lblLastName.Text = strLastName;<br />
}
and when i enter no text or when i tried to trigger the text change event of the TextBox i got this error (it works just fine when i enter a full name)
An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll<br />
<br />
Additional information: Length cannot be less than zero.
Thanks in advance (plz try to keep this simple as i am quite new to C#, thanks in advance  )
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intLocation1 = strFullName.IndexOf(" ");
In an empty strFullName the " " isn't found, so intLocation1 is -1.
strFirstName = strFullName.Substring(0,intLocation1);
For an empty strFullName this means Substring(0, -1). What is a String with a negative length? 
You should catch empty and short names:
<br />
String[] nameParts = strFullName.Split(' ');<br />
if(nameParts.Length == 3){<br />
strFirstName = nameParts[0];<br />
strInitial = nameParts[1];<br />
strLastName = nameParts[2];<br />
else if(nameParts.Length == 2){<br />
strFirstName = nameParts[0];<br />
strLastName = nameParts[1]; <br />
}else{<br />
MessageBox.Show("Please enter a full name.");<br />
}<br />
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Heh, got it mate. Thanks for taking the time to help me understand this one John. Although i am not that used working with arrays it seems to be much "smoother" than my declaration
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Need some help :
When I tried to read Identity column with ADO.NET DataReader, I'm getting the following error::=>
"The data value could not be converted for reasons other than sign mismatch or data overflow.For example, the data was corrupted in the data store but the row was still retrievable."..
The Code which I wrote is described below:
oDR is data reader
while(oDR.Read())
{ListItem oItem = new ListItem(oDR.GetString(2),oDR.GetInt32(0).ToString());
wsdrpdwnlst1.Items.Add(oItem);} //wsdrpdwnlst1 is a list box
Note : (where oDR.GetInt32(0) supposed to give me the identity column.) but I am getting the above error. I need the help at the earliest if possible.
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The error is definitely pointing at your oDR.GetInt32(0).ToString() portion of your code. You don't show what the SQL select statement looks like. But it sounds like the data you are getting is either not Int32 (and thus cannot convert it) or IS CORRUPT.
The first thing to do is find out just what the problem is with the data. Put a breakpoint at the while statement, step into the read, then do a QuickWatch on the oDR object to see what your second parameter data actually is. It could be something as simple as the fact that the data IS numeric, but your database is returning leading SPACES instead of leading ZERO.
If the data looks like crap, then the next thing to do is take the SQL that you are using in your program and run it inside Query Analyzer if is SQL or the equivalent if it is Oracle. See what you get back with the raw SQL and make sure your SELECT statement is truly executing the way you think it is.
All Debug 101 tasks.
_____________________________________________
The world is a dangerous place.
Not because of those that do evil,
but because of those who look on and do nothing.
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Heyas,
I am writing on a component which uses the ProvideProperty Attribute to add new properties to other existing components. And it works fine. But, the new property doesn't have any description etc., in other words no Description, Editor etc. Attribute to make it fine. I am searching for hours now but didn't find any way to add Attributes to ProvideProperty-added properties .
Does anyone have experience in this?
Thanks,
'Mike
--------------------------
xplo.re Project Management
http://www.xplo-re.com/
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Maybe you are looking too hard. Take a look at this :
http://www.codeproject.com/dotnet/iextenderprovider.asp
All you have to do is this :
[Description("Description")]
[Category("Appearance")]
public string GetMyString(Panel p)
{
return EnsurePropertiesExists(p).MyString;
}
You set the description attribute not in the class, but on the actual GetXXXX function.
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Ah, thanks very much!
This works. I already tried same as in the given code, but using the SetXXX method... well wrong choice >.<
Now it works perfect 
--------------------------
xplo.re Project Management
http://www.xplo-re.com/
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Hi guys,
I've been searching for this for 4 hours, but it just doens't seem to work.
I have an access database, and i have to add a column to it.
Here's my code:
string connString = "Provider=Microsoft.Jet.OLEDB.4.0;" +<br />
@"Data Source=D:\My Documents\Visual Studio 2003.NET\VerboServe\Verboserve.mdb;" +<br />
"User ID=Admin;" +<br />
"Password=";<br />
OleDbConnection conn = new OleDbConnection(connString);<br />
DataSet ds = new DataSet();<br />
<br />
conn.Open();<br />
<br />
OleDbDataAdapter dataAdapter = new OleDbDataAdapter("SELECT * FROM Verbs", conn);<br />
OleDbCommandBuilder commandBuilder = new OleDbCommandBuilder(dataAdapter);<br />
<br />
dataAdapter.Fill(ds, "Verbs");<br />
<br />
ds.Tables["Verbs"].Columns.Add("Wouter");<br />
<br />
foreach (DataRow thisRow in ds.Tables["Verbs"].Rows)<br />
{<br />
thisRow["Wouter"] = "True";<br />
}<br />
<br />
commandBuilder.QuotePrefix = "[";<br />
commandBuilder.QuoteSuffix = "]";<br />
<br />
ds.AcceptChanges();<br />
dataAdapter.Update(ds, "Verbs");
Can anyone tell me how to do this?
Thanks,
Wouter
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ds.AcceptChanges is marking all rows as normal. DataAdapter.Update searches for changed rows and updates them, then internally calls AcceptChanges. Since you're doing this yourself BEFORE calling Update, the Update method is NOT seeing any changes.
-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----
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Thankx for the info, but i am adding columns here, or is that the same?
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You can't do it that way. You either have to issue an ALTER TABLE command or use a product-specific library to modify the database structure, like DDL for Access or SQL-DMO or SQL Server. This has been addressed many times before here. I suggest you click Search Comments and see some of the replies for more details and other ideas. While searching comments, you should probably also include the ADO.NET forum, too.
-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----
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i'm make Socket program
this is Receive file this img file, avi file..
but can't Receive XMLfiles
this is source
* Receive File info
================================================================
while(rData!=null)
{
byte[] rbuffer = new Byte[1024];
int rcount = rData.Receive(rbuffer, rbuffer.Length, 0);
string Cm = ed.GetString(rbuffer);
Cm = Cm.Substring(0, rcount);
Cml = null;
Cml = Cm.Split(':');
this.listBox1.Items.Add("Header Info");
this.listBox1.Items.Add("Data Type : " + Cml[0]);
this.listBox1.Items.Add("Data Name : " + Cml[1]);
this.listBox1.Items.Add("Data Length : " + Cml[2]);
if (Cml[0] == "Binnary")
{ FileReceive(rData, Cml);}
else if (Cml[0] == "Str")
{this.listBox1.Items.Add("String Value :" + Cml[3]);}
rData.Close();
rData = null;}
===================================================================
* Receive file
================================================================
FileStream fout = new FileStream(@"c:\youngTemp\" + cml[1]+"1",FileMode.Create, FileAccess.Write);
NetworkStream nfs = new NetworkStream(rData);
long DataSize = int.Parse(cml[2]);
long rby = 0;
try
{
while(rby < DataSize)
{ byte[] buffer = new Byte[1024]; int i = nfs.Read(buffer, 0, buffer.Length); fout.Write(buffer, 0, i); rby += 1;
}
this.listBox1.Items.Add("Success ");}catch(Exception ex)
{
this.listBox1.Items.Add("Error");
this.listBox1.Items.Add("Error is : " + ex.ToString());}
finally{
fout.Close();nfs.Close();
nfs= null;fout = null;}
=====================================================================
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You should debug your code. An XML file is no different than a image file or an AVI - they are all just a stream of bytes. If your app treats them as such (And your code indicates that you do), then your app doesn't care - at the time of transfer - what is in the files themselves. XML files are not these special files sent from God, but just a formatted document, formatted accordingly to certain "guidelines" just like the various image codecs and AVI codecs.
The only problem I can see if your code is that you're writing out a binary file. Depending on how bytes are written or transfered, you may need to take file encodings into account. The only difference between the XML files you mention and the image and AVI files is that the former is a text file (ASCII, UTF8, Unicode, etc.) while the latter two are binary. There many be a problem in the way you handle text files. You should consider what FTP does, which is send such files using a text encoding while transfering.
-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----
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how to build a generic application which will take a table as a parameter
& do add,modify, delete operations on that table can some one offer a solution please !
Dileepa
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You can't take a table as a parameter. You could take a table name or a filename with a DataTable (serialized as XML) in it. Then use commands in the System.Data namespace (like System.Data.SqlClient.SqlCommand or System.Data.SqlClient.SqlDataAdapter) to do what you need. All the documentation is in the .NET SDK documentation and there are plenty of examples here on the CP site.
-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----
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hi i am making a program that controlling connecting to net, and ineed to detect connections which connected outside my program, i want to detect any connection on pc to find duration i didn,t find the way
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How can I set page number in printing progress? Any property or trick?
Mazy
No sig. available now.
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Handle the PrintDocument.PrintPage event and increment your printed page counter from 1 with each callback to your event handler.
-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----
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Thanks Heath. Is that possible to find out number of page before printing?
Mazy
No sig. available now.
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That depends on you - it's your code generating and printing pages after all. If you're simply printing text, you can get the height of the font, factor in the extra line height (which you control) and margins, and measure the string to print. From that you could calculate the number of pages. If you're drawing pictures and what-not, you calculate the picture size multiplied by any zoom amounts (percentages).
-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----
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Thanks Heath. I got the point. 
Mazy
No sig. available now.
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I have a 50% transparent window that is on top of the desktop.
I want the user to be able to click 'Through the transparent window' onto objects behind it ... my computer.
The transparent window does not need force it just needs to be ontop of all the other windows.
another example is .. if you press alt-ctrl-del to bring up task manager how can i program the window to pass mouse clicks on it to the window behined it, if task manger is my program?
I hope this is clear enough to answer
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Maybe it would help to enumerate the visible windows, find the window laying under your window but top of all other windows and the click point lies in it's client area and pass WM_* event message to the window...
Maybe there is another easier way to do that, but maybe this will help. Good luck ^^
--------------------------
xplo.re Project Management
http://www.xplo-re.com/
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