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Hehe..
Playing a little around....
System.Convert.ToInt32(enumObject) works perfect. Thanks anyway
Gooky
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Hi,
Someone responded to my post before, about how to keep the scroll bar at the bottom of a text field... I didn't understand the code ONE bit, and I am used to vb, with the simple Text1.SelText(Text1) type deal... is there a similar method within c#? i scanned MSN docs to find nothing -_- please help!!!!
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How about the following:
string str = "Nick Parker";
text1.Test = str;
string search = "Nick";
int index = str.IndexOf(search, 0, 0);
if(index != -1)
{
text1.Select(index, search.Length);
}
- Nick Parker My Blog | My Articles
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A new version of wx.NET was recently released. wx.NET provides .NET bindings for wxWidgets, a powerful cross-platform GUI toolkit. wx.NET/wx.Widgets uses the native UI framework on each supported platform: Windows, Linux, and Mac OS X.
The new 0.5 version has many improvements over previous releases. A quick summary of changes:
- Dozens of new classes.
- Full support for Mac OS X.
- New event system: Activated, Closing, MouseEnter, etc. events.
- Easier to use binary downloads for Windows, Linux, and Mac OS X.
- An new build system to make compiling easier along with a user manual to step you through the process.
- 6 new samples and an easy to use sample launcher.
- A new tool to generate C# or VB.NET code from XRC or wxGlade WXG UI layout files. Supports editing of the resulting code and
modifications to the UI similar to the VS.NET System.Windows.Forms designer. - CLS compliant (no more uints).
- Numerous bug fixes.
Key contributors to this release:
- Alexander Olk
- Bryan Bulten
- Mike Muegel
Wx.NET is completely open source and free. More information is available at:
http://wxnet.sf.net/
We have recently started a fundraising campaign to support the work of Alexander Olk on the project. Please see the following for details:
http://wxnet.sf.net/donate.html
Even a little bit will help accelerate development. I've jump started the fund by donating US$150.
Best Regards,
-Mike Muegel on behalf of the wx.NET Development Team
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Mike, due to the large number of threads within the C# forum, you may consider writing an article about using wx.NET and posting it here on CP, otherwise this thread will soon become lost. Good luck.
- Nick Parker My Blog | My Articles
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I'm using Late binding to control powerpoint. I now am at the point where
it does what I want it to do, but I need some eventhandling to know what it's doing.
All the samples I see that deal with events use early binding
(http://support.microsoft.com/default.aspx?scid=kb;en-us;308825)
and this type of function:
<br />
oPPT = new PowerPoint.ApplicationClass();<br />
UCOMIConnectionPointContainer oConnPointContainer = (UCOMIConnectionPointContainer) oPPT;<br />
Since I'm using LateBinding, i Use:
<br />
Object oPPT;<br />
Type objClassType;<br />
objClassType = Type.GetTypeFromProgID("Powerpoint.Application");<br />
oPPT = Activator.CreateInstance(objClassType);<br />
Now when trying to do the same thing with UCOMIConnectionPointContainer it returns NULL because it's just an 'object' due to late binding - How do i fix this?
How can I hook up events when using late binding? Is this even possible?
Thanks
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I have a datagrid that all of its columns are BoolColumnStyle and its DataSource is a table with no relations. I relate this DG with a counter, when I mark true or false in each DataGridCell the counter adds or subtracts (respectively) a certain number. Also I relate a TreeView with this DataGrid that the previous counter works separately for each TreeNode under the TopNode in this DataGrid. I used the following code to make my datagrid to respond to one click :
private void dataGrid1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
DataGrid.HitTestInfo hti = this.dataGrid1.HitTest(e.X, e.Y);
try
{
if( hti.Type = = DataGrid.HitTestType.Cell )
{
int r = (int)hti.Row;
int c = (int)hti.Column;
DataRow dr = table.Rows[r];
DataColumn dc = table.Columns[c];
this.dataGrid1[r,c] = !(bool) this.dataGrid1[r,c];
}
}
catch(Exception ex )
{
MessageBox.Show(ex.ToString());
}
} I have the following problems :
1. The following message appears. I do not know what is the ListManeger or in other words, I do not understand what is the problem.
The ListManeger’s position must be equal to the rowNum.
Parameter name: rowNum Do you want to correct the value? 2. The DataGrid responds to clicks even when there is no any TreeNodes are selected although I make a ckeck if (TreeView.TreeNode IsSelected). I want the DataGrid to respond to clicks only when any TreeNode under the TopNode is selected.
3. when the selected TreeNode is changed, I empty the DataGrid by the following code, but the last cell that I add a value to it remains checked :
for(int i=0 ; i<table.Rows.Count ; i++)
{
DataRow dr = table.Rows[i];
for(int j=0 ; j<table.Columns.Count; j++)
{
dr[j] = false;
}
} The problems 1 and 3 disturb my counter.
Please if there is a solution.
Thank you
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Let's say that I am having two Dataset objects ds1 and ds2. These DataSets have exactly the same schema. Same DataTable (only one) in each DataSet and same DataColumns. Can anyone tell me, how can I join these two DataSets into a third one, so that the new one will have the DataRows of ds1.Tables[0] followed by the DataRows of ds2.Tables[0]?
.::YF::.
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Let's say that I am having two Dataset objects ds1 and ds2. These DataSets have exactly the same schema. Same DataTable (only one) in each DataSet and same DataColumns. Can anyone tell me, how can I join these two DataSets into a third one, so that the new one will have the DataRows of ds1.Tables[0] followed by the DataRows of ds2.Tables[0]?
The language I am writing the project is C#.
.::YF::.
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Try to create a function to join them... Maybe this that join tables can help you
public static DataTable JoinDataTable(DataTable odtt1, DataTable odtt2)
{
DataTable odtt = odtt1.Copy();
foreach(DataRow row in odtt2.Rows)
{
try
{
DataRow r = odtt.NewRow();
r.ItemArray = row.ItemArray;
odtt.Rows.Add(r);
}
catch(Exception e) //if the schema are not equal
{
string x = e.Message;
break;
}
}
return odtt;
}
Just do
DataSet ds3 = new DataSet();
ds3.Tables.Add(JoinDataTable(ds1.Tables[0],ds2.Tables[0]));
maybe it works... good luck
Wender Oliveira
.NET Programmer
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Hi,
This is probably a really dumb question, but I haven't done many C# Windows apps - I've been living in the web world. What's the usual way of defining some standard sets of fonts/size/colors for all the labels of a windows app? I'll have many labels of 3 basic 'styles' and I don't want to go and set the font size on each of them. I'd rather declare the 3 'styles' and attach the labels to them.
thanks,
Deanna
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There's not really something like css for Windows Forms built-in.
Unless overriden, a control adapts to it's container's properties (for example, dropping a label onto a form will give it the font, fore- and backcolor of the form), but that's not really what you want.
I think you'll have to invent something on your own...
You could derive a LabelWithStyle from Label, though. This label could receive an additional Style property and look up fonts, colors etc. from an embedded resource.
Regards,
mav
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Hi.
I creat this property:
private byte[] m_buf;<br />
public byte[] Buffer<br />
{<br />
get{return m_buf;}<br />
set{m_buf=value;}<br />
} when i bind this property to Image type in sql server, at run time displaying this error:
cannot convert system.DBNull to other type.
please help me.
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Hi!
I am developing a client/server app.
The problem is that the server side is uneable to read from the cryptostream (although the underlying NetworkStream has available data).
Here's the client side:
tcpc=new TcpClient();
tcpc.Connect(Client.Settings.serverName,Client.Settings.ServerRegisterPort);
NetworkStream S=tcpc.GetStream();
BinaryFormatter bf=new BinaryFormatter();
CryptoStream Si, So;
Client.DoKeyExchange(S,out Si,out So);
string resp="OK\n";
byte b=3;
So.WriteByte(b);
So.Flush();So.FlushFinalBlock();
S.Flush();
And the server side:
NetworkStream S=new NetworkStream(Soc,true);
BinaryFormatter bf=new BinaryFormatter();
CryptoStream Si,So;
Server.GetKeyExchange(S,out Si,out So);
b=Si.ReadByte();
The server block (maybe waiting for more data) at this line.
And the two functions:
public static void DoKeyExchange(Stream S, out CryptoStream Si, out CryptoStream So)
{
Rijndael rijn=Rijndael.Create();
//rijn.KeySize=128;
rijn.GenerateIV();
rijn.GenerateKey();
RSAOAEPKeyExchangeFormatter RsaF=new RSAOAEPKeyExchangeFormatter(rsa);
byte [] iv=RsaF.CreateKeyExchange(rijn.IV);
byte [] key=RsaF.CreateKeyExchange(rijn.Key);
BinaryFormatter bf=new BinaryFormatter();
bf.Serialize(S,iv);
bf.Serialize(S,key);
S.Flush();
rijn.Key=ASCIIEncoding.ASCII.GetBytes("ABCDEFGHABCDEFGH");
rijn.IV=ASCIIEncoding.ASCII.GetBytes("ABCDEFGHABCDEFGH");
So=new CryptoStream(S,rijn.CreateEncryptor(),CryptoStreamMode.Write);
Si=new CryptoStream(S,rijn.CreateDecryptor(),CryptoStreamMode.Read);
}
public static void GetKeyExchange(Stream S, out CryptoStream Si, out CryptoStream So)
{
RSAOAEPKeyExchangeDeformatter RsaF=new RSAOAEPKeyExchangeDeformatter(rsa);
BinaryFormatter bf=new BinaryFormatter();
byte [] iv=(byte[])bf.Deserialize(S);
byte [] key=(byte[])bf.Deserialize(S);
iv=RsaF.DecryptKeyExchange(iv);
key=RsaF.DecryptKeyExchange(key);
Rijndael rij=Rijndael.Create();
rij.IV=iv;
rij.Key=key;
Si=new CryptoStream(S,rij.CreateDecryptor(key,iv),CryptoStreamMode.Read);
So=new CryptoStream(S,rij.CreateEncryptor(key,iv),CryptoStreamMode.Write);
}
Any ideeas?
Best,
Mircea
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Hi, all the time is showing me error at line:
objConexao = New SqlConnection(connString);
which says that I forgot the semicolon(;), but as you can see I did not forget it!
See the whole routine bellow inside a .aspx page:
<%@ Page Language="C#" Debug="true"%>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<script language="C#" runat="server">
public void Page_Load(Object Sender, EventArgs EA)
{
String connString,strSQL;
SqlConnection objConexao;
SqlCommand objCommand;
SqlDataReader objDataReader;
connString = "Server=Localhost; Database=Northwind; Uid=SqlService; Password=xx;";
objConexao = New SqlConnection(connString);
objConexao.Open();
strSQL = "SELECT * FROM Products";
objCommand = New SqlCommand(strSQL, objConexao);
objDataReader = objCommand.ExecuteReader(CommandBehavior.CloseConnection);
While(objDataReader.Read = True)
{
lblSaida.Text += objDataReader["ProductName"] + " - " + objDataReader["UnitPrice"] + "<br>";
}
objDataReader.Close();
objConexao.Close();
objDataReader = Nothing;
objCommand = Nothing;
objConexao = Nothing;
}
</script>
-------------
Thanks,
=========================
Vilmar Brazão de Oliveira
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This question belongs in the ASP.NET[^] forum. However just a side note, that message is typically a sign that you left something out above where it ran into your code statement saying you need a semicolon.
- Nick Parker My Blog | My Articles
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OK, so how can I fix it?
thanks by help.
=========================
Vilmar Brazão de Oliveira
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Take care... you're mixing VB and C#... C# is case sensitive so make your line objConexao = New SqlConnection(connString); to have a lowercase new like objConexao = new SqlConnection(connString);
don't forget that Nothing doesn't exists... use null like
objDataReader = null;
But I think that you won't need to set null or nothing to your objects because your already have the Garbage Colector
Good Luck and abraços!
Wender Oliveira
.NET Programmer
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Hey guys,
I thank you all!
Wender you guessed! My problem is that I am more habituated with VB/VB.net than with C#.
Regards,
Um abraço tb.!
=========================
Vilmar Brazão de Oliveira
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How can I get an XmlNode from an XmlTextReader . What I really want to know is this.
Here is my XmlTextReader
XmlTextReader xtr=new XmlTextReader(this.textBox1.Text);
Now, I want to use this method, but I can't get an XmlNode out of xtr. What do I do?
public void LoopThroughChildren(XmlNode root)
{
this.listBox1.Items.Add(root.Name+ " \t\t\t"+root.FirstChild.Value);
foreach (XmlNode n in root.ChildNodes)
{
if (n.NodeType == XmlNodeType.Element)
{
LoopThroughChildren(n);
}
}
}
I was using an XmlDocument but my xml file is too large to use it anymore... So basicilly can somebody help me write a recursive method that goes though an entire xml file?
/\ |_ E X E GG
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Nevermind, I just realized how dumb my question was...
/\ |_ E X E GG
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Have you thought about using XPath to select from your XML document?
- Nick Parker My Blog | My Articles
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nope. I don't know what that is.
/\ |_ E X E GG
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There are a series of classes within the .NET Framework that support XPath. Read the XPath specification at the W3C[^], there are also a bunch of useful articles that may be more easy to understand that can be found on Google. This[^]
might be the easiest way to get started.
- Nick Parker My Blog | My Articles
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Just you opinion here... Do you think this would be a better substitute for parsing a huge XML file into a database and then running queries on it???? Running xpath queries sounds pretty nice.
/\ |_ E X E GG
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