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thanks for your reply, henry.
The error happens here: dgTrans.Rows[y].Cells[1].Value = dr[0]["DocTitle"]; with description "Index was outside the bounds of the array". It means no result in datarow array dr[]. how to do nothing if no result in dr[]?
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OK.
Simply test for a valid dr before trying to do anything with it.
private void dgcboDocNo_SelectedIndexChanged(object sender, EventArgs e)
{
System.Diagnostics.Debug.WriteLine(dataGridView1.CurrentCell.ColumnIndex + "SelectedIndexChanged");
string docno = ((DataGridViewComboBoxEditingControl)sender).Text.ToString();
DataRow[] dr = myDs.Tables["DetailDocRegister"].Select("DocNo = '" + docno + "'");
if (dr.Length > 0)
{
int y = dataGridView1.CurrentCellAddress.Y;
dataGridView1.Rows[y].Cells[1].Value = dr[0]["DocTitle"];
}
}
Note that I have also changed your reference to string docno = ((ComboBox)sender).Text.ToString(); this is because the DataGridViewComboBoxEditingControl has properties and methods that a plain old ComboBox doesn't. One day you might need to use them so it's a good idea to get into the habit of using the proper control now. You should also do this in your EditingControlShowing handler:
private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
DataGridViewComboBoxEditingControl combo = e.Control as DataGridViewComboBoxEditingControl;
System.Diagnostics.Debug.WriteLine(dataGridView1.CurrentCell.ColumnIndex + "EditControlShowing");
if (combo != null)
{
combo.SelectedIndexChanged -= new EventHandler(dgcboDocNo_SelectedIndexChanged);
combo.SelectedIndexChanged += new EventHandler(dgcboDocNo_SelectedIndexChanged);
}
}
Hope this helps.
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
I wouldn't let CG touch my Abacus!
When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.
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It really works. thank you very much, Henry.
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Incidentally, if you are doing a fair amount of work with the DGV you might find the following links of interest. They are for the same thing but one is in *.doc format and the other is a *.pdf.
DataGridview FAQ.doc[^]
DataGridView FAQ.pdf[^]
Sample code is available at Sample Code[^]
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
I wouldn't let CG touch my Abacus!
When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.
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How to save a folder in one location to save in a different location using c# ?
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If you want to copy try
public static void CopyDirectory(string source, string destination, bool overwrite)
{
if (!Directory.Exists(destination))
Directory.CreateDirectory(destination);
DirectoryInfo dirInfo = new DirectoryInfo(source);
foreach (FileInfo fileInfo in dirInfo.GetFiles())
fileInfo.CopyTo(Path.Combine(destination, fileInfo.Name), overwrite);
foreach (DirectoryInfo subDirectoryInfo in dirInfo.GetDirectories())
CopyDirectory(subDirectoryInfo.FullName, Path.Combine(destination, subDirectoryInfo.Name), overwrite);
}
Snippet found here
"You get that on the big jobs."
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Hi.
I know how to edit these files. I've lost a number of sources so I had to rebuild. But, I have one app that I cannot replace the resource. App is C# of course.
From Reflector: http://www.imagebam.com/image/6001d3124889081[^]
There are .baml files and even some pngs and gifs. I managed to replace pngs before but here I cannot. Why? Is it because of PinnedMemory thing?
Any help would be appreciated.
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I had developed an application which is a desktop application and DB is Online.
What i need is a Message popup to all the clients whenever i upload a new version on net.
(Installer is online)
Source used - C#, SQL 2008, Crystal Report 11, flash
I have no idea how to start this activity.
Please help
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Or have a newsletter to which people can subscribe.
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I want to know how to define property?
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Hi,
To add a property say Name do the following in your class.
private string _name;
public string Name
{
get{ return _name;}
set {_name = value;}
}
hope this helps.
Nitheesh George
http://www.simpletools.co.in
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It does, but just as a note. In an instance like this it is cleaner to use the auto-property. public string name { get; set; } with no private member defined. (Your answer is still correct, of course)
I wasn't, now I am, then I won't be anymore.
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I am writing a socket server and I have some trouble which I did expose through the program below.
If your run this program (this is a console program).
You'll find it open a web browser on a local address and shows 256 small pictures.
For the purpose of this test the pictures are actually quite large but are shown in small.
This is the complete C# 4.0 source, I encourage you to try it.
It really render really fast considering the time I have put into this.
But if you refresh your page you'll see that some of the pictures do not appear properly.
Anyone knows the reason for this.
using System;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
namespace MiniHttpServer
{
class Program
{
static void Main(string[] args)
{
HttpServer.Test();
}
class HttpServer
{
internal static Byte[] mIndex;
internal static Byte[] mPic;
Socket mMainSocket;
bool mUseHttp11;
static HttpServer()
{
mIndex = GetIndex();
mPic = GetCirclePicture();
}
public static void Test()
{
var httpServer = new HttpServer();
httpServer.StartServer(port: 3005, nbListeners: 4, useHttp11: true);
Process.Start("http://localhost:3005/");
Console.WriteLine("Press a key to exit");
Console.ReadKey(intercept: true);
httpServer.Stop();
}
private static Byte[] GetIndex()
{
StringBuilder html = new StringBuilder();
html.AppendLine("<html><body>");
html.AppendLine("<h1>Pics</h1>");
int k = 0;
for (int j = 0; j < 16; j++)
{
for (int i = 0; i < 16; i++)
{
html.AppendLine("<img width='16' height='16' src='p" + (k++) + ".png'>");
}
html.AppendLine("<br/>");
}
return Encoding.UTF8.GetBytes(html.ToString());
}
private static Byte[] GetCirclePicture()
{
var bmp = new Bitmap(256, 256);
using (var g = Graphics.FromImage(bmp))
{
for (int i = 0; i < 128; i++)
{
g.FillEllipse(new SolidBrush(Color.FromArgb(i, i, 255)), i, i, 255 - 2 * i, 255 - 2 * i);
}
}
var mem = new MemoryStream();
bmp.Save(mem, ImageFormat.Png);
return mem.ToArray();
}
public void StartServer(int port, int nbListeners, bool useHttp11)
{
mUseHttp11 = useHttp11;
var webAddress = new IPEndPoint(IPAddress.Loopback, port);
try
{
mMainSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
mMainSocket.Bind(webAddress);
mMainSocket.Listen(255);
for (int i = 0; i < nbListeners; i++)
{
CreateListener(i);
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
private void CreateListener(int l)
{
var newTask = Task.Factory.StartNew(delegate
{
var requestSocket = mMainSocket.Accept();
Console.WriteLine("L{0} is Accepted", l);
ProcessRequest(requestSocket, l);
Console.WriteLine("L{0} is dying gracefully", l);
}).ContinueWith(delegate
{
if (mMainSocket.IsBound)
{
Console.WriteLine("L{0} is really dead and is trying to resurrect", l);
CreateListener(l);
}
else
{
Console.WriteLine("L{0} is really dead and burried", l);
}
});
}
private void ProcessRequest(Socket requestSocket, int l)
{
try
{
const int BUFFER_SIZE = 4096;
var requestBuffer = new Byte[BUFFER_SIZE];
int requestPos = 0;
int requestNo = 0;
while (requestPos < BUFFER_SIZE)
{
SocketError socketError;
var read = requestSocket.Receive(requestBuffer, requestPos, requestBuffer.Length - requestPos, SocketFlags.None, out socketError);
if (socketError == SocketError.TimedOut)
{
continue;
}
if (read == 0) continue;
var requestString = Encoding.ASCII.GetString(requestBuffer, 0, read);
var sr = new StringReader(requestString);
var line = sr.ReadLine();
var request = line;
while (line != null && line.Length > 0)
{
line = sr.ReadLine();
}
if ((line = sr.ReadToEnd()) != null && line.Length > 0)
{
Console.WriteLine("Lost:" + line);
}
int len = requestPos + read;
int pos = IndexOfCrLfCrLf(requestBuffer, len);
if (pos >= 0)
{
if (pos == 0)
break;
requestNo++;
Console.WriteLine("{0} is processing request #{1}", l, requestNo);
requestPos = 0;
string response = "Hello";
string contentType = "text/plain";
Byte[] responseArray = null;
if (requestString.StartsWith("GET / "))
{
contentType = "text/html";
responseArray = mIndex;
}
else if (requestString.IndexOf(".png") >= 0)
{
contentType = "image/png";
responseArray = mPic;
}
if (responseArray == null) responseArray = Encoding.UTF8.GetBytes(response);
string header =
"HTTP/1." + (mUseHttp11 ? '1' : '0') + " 200 OK\r\n"
+ "Content-Length: " + responseArray.Length + "\r\n"
+ (mUseHttp11 ? ("Content-Type: " + contentType + "\r\n") : "")
+ "\r\n";
byte[] headerArray = Encoding.UTF8.GetBytes(header);
requestSocket.Send(headerArray, headerArray.Length, SocketFlags.None);
requestSocket.Send(responseArray, responseArray.Length, SocketFlags.None);
if (mUseHttp11 == false)
{
requestSocket.Close();
break;
}
}
else requestPos = len;
}
Console.WriteLine("Request complete");
}
catch (Exception ex)
{
Console.WriteLine("Exception " + ex.Message);
}
}
private void Nop()
{
}
public void Stop()
{
mMainSocket.Close();
}
static int IndexOfCrLfCrLf(byte[] requestBuffer, int len)
{
for (int i = 0; i <= (len - 4); i++)
{
if (requestBuffer[i] == '\r'
&& requestBuffer[i + 1] == '\n'
&& requestBuffer[i + 2] == '\r'
&& requestBuffer[i + 3] == '\n')
{
return i;
}
}
return -1;
}
}
}
}
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The Shadow knows... 
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Considering noone will see this post in a couple of days, you'd be better off writing an article on it, how it was designed, the concepts behind it, how the code works, ...
[EDIT]
Sorry, I missed the question that was in there!
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There was actually a question in there from the OP
"... if you refresh your page you'll see that some of the pictures do not appear properly.
Anyone knows the reason for this"
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Crap... Missed that one. 
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The browser will reuse the connection, and you're resetting the requestPos pointer to 0 when you receive a message. What you don't do is check if there is material left at the end of the current buffer which is part of the next message (after the CRLF pair). You need to copy everything after the two CRLFs back to requestBuffer[0] and set requestPos appropriately.
This should fail the first time as well as on refresh, though.
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I Have found what the problem was.
It was not so much as there was data in the connected socket I did not read but new connection I was not serving.
Having it in multiple threads to accept the connection didn't really help.
I was only accepting once and recreating a task was probably not fast enough.
Having it in a loop works well:
while (true)
{
var connectedSocket = mMainSocket.Accept();
Task.Factory.StartNew(delegate
{
ServeConnection(connectedSocket, l);
});
}
I copy the whole source, for all the times I found a 2 years old forum question that finishes by 'I found the solution never mind!' and I wish I could read it:
using System;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
namespace MiniHttpServer
{
class Program
{
static void Main(string[] args)
{
HttpServer.Test();
}
class HttpServer
{
internal static Byte[] mIndex;
internal static Byte[] mPic;
Socket mMainSocket;
bool mUseHttp11;
static HttpServer()
{
mIndex = GetIndex();
mPic = GetCirclePicture();
}
public static void Test()
{
var httpServer = new HttpServer();
httpServer.StartServer(port: 3005, nbListeners: 1, useHttp11: true);
Process.Start("http://localhost:3005/");
Console.WriteLine("Press a key to exit");
Console.ReadKey(intercept: true);
httpServer.Stop();
}
private static Byte[] GetIndex()
{
StringBuilder html = new StringBuilder();
html.AppendLine("<html><body>");
html.AppendLine("<h1>Pics</h1>");
int k = 0;
for (int j = 0; j < 10; j++)
{
for (int i = 0; i < 10; i++)
{
html.AppendLine("<img width='16' height='16' src='p" + (k++) + ".png'>");
}
html.AppendLine("<br/>");
}
return Encoding.UTF8.GetBytes(html.ToString());
}
private static Byte[] GetCirclePicture()
{
var bmp = new Bitmap(256, 256);
using (var g = Graphics.FromImage(bmp))
{
for (int i = 0; i < 128; i++)
{
g.FillEllipse(new SolidBrush(Color.FromArgb(i, i, 255)), i, i, 255 - 2 * i, 255 - 2 * i);
}
}
var mem = new MemoryStream();
bmp.Save(mem, ImageFormat.Png);
return mem.ToArray();
}
public void StartServer(int port, int nbListeners, bool useHttp11)
{
mUseHttp11 = useHttp11;
var webAddress = new IPEndPoint(IPAddress.Loopback, port);
try
{
mMainSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
mMainSocket.Bind(webAddress);
mMainSocket.Listen(255);
for (int i = 0; i < nbListeners; i++)
{
CreateListener(i);
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
private void CreateListener(int l)
{
var newTask = Task.Factory.StartNew(delegate
{
while (true)
{
var connectedSocket = mMainSocket.Accept();
connectedSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 1000);
Console.WriteLine("L{0} is Accepted", l);
var task2 = Task.Factory.StartNew(delegate
{
ServeConnection(connectedSocket, l);
});
}
}).ContinueWith(delegate
{
if (mMainSocket.IsBound)
{
Console.WriteLine("L{0} is really dead and is trying to resurrect", l);
CreateListener(l);
}
else
{
Console.WriteLine("L{0} is really dead and burried", l);
}
});
}
private void ServeConnection(Socket connectedSocket, int l)
{
int requestNo = 0;
try
{
const int BUFFER_SIZE = 4096;
var requestBuffer = new Byte[BUFFER_SIZE];
int readIndex = 0;
while (true)
{
SocketError socketError;
var read = connectedSocket.Receive(requestBuffer, readIndex, requestBuffer.Length - readIndex, SocketFlags.None, out socketError);
var requestString = Encoding.ASCII.GetString(requestBuffer, 0, read);
Console.WriteLine("{0} read {1} ({2})", l, read, requestString.Substring(0, Math.Min(20, requestString.Length)));
if (read == 0) return;
int pos = IndexOfCrLfCrLf(requestBuffer, read);
readIndex += read;
if (pos < 0)
{
pos = 0;
}
else
{
while (pos >= 0)
{
if (pos == 0)
break;
requestNo++;
string response = "Hello";
string contentType = "text/plain";
Byte[] responseArray = null;
requestString = Encoding.UTF8.GetString(requestBuffer, 0, pos);
if (requestString.StartsWith("GET / "))
{
contentType = "text/html";
responseArray = mIndex;
}
else if (requestString.IndexOf(".png") >= 0)
{
contentType = "image/png";
responseArray = mPic;
}
if (responseArray == null) responseArray = Encoding.UTF8.GetBytes(response);
string header =
"HTTP/1." + (mUseHttp11 ? '1' : '0') + " 200 OK\r\n"
+ "Content-Length: " + responseArray.Length + "\r\n"
+ (mUseHttp11 ? ("Content-Type: " + contentType + "\r\n") : "")
+ "\r\n";
byte[] headerArray = Encoding.UTF8.GetBytes(header);
connectedSocket.Send(headerArray, headerArray.Length, SocketFlags.None);
connectedSocket.Send(responseArray, responseArray.Length, SocketFlags.None);
if (mUseHttp11 == false)
{
connectedSocket.Close();
return;
}
pos += 4;
readIndex -= pos;
if (readIndex > 0)
{
Array.Copy(requestBuffer, pos, requestBuffer, 0, readIndex);
pos = IndexOfCrLfCrLf(requestBuffer, readIndex);
}
else
{
readIndex = 0;
pos = -1;
}
}
}
}
Console.WriteLine("Request complete");
}
catch (Exception ex)
{
Console.WriteLine("Exception " + ex.Message);
}
finally
{
connectedSocket.Close();
}
}
private void Nop()
{
}
public void Stop()
{
mMainSocket.Close();
}
static int IndexOfCrLfCrLf(byte[] requestBuffer, int len)
{
for (int i = 0; i <= (len - 4); i++)
{
if (requestBuffer[i] == '\r'
&& requestBuffer[i + 1] == '\n'
&& requestBuffer[i + 2] == '\r'
&& requestBuffer[i + 3] == '\n')
{
return i;
}
}
return -1;
}
}
}
}
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I had windows service and setup projects developed in VS 2008 .NET 3.5.
Setup was converted to VS 2010 and windows service project replaced with new one created in VS 2010 .NET 4.0.
There are custom actions in setup to install service in the system.
The Error 1001 System.BadImageFormatException failed to load service exe due to incorrect format appears during setup execution.
Without custom action the setup runs without problems. I can also manually install the service with installutil.exe
Are there any settings in the setup project to run correct installutil from the right .NET version?
Чесноков
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Hi All,
I am writing text into StreamWriter by sw.Write("Text coming from Labels : so can be in english or chinese or any other languages") method.
After writing first text, I am adding tabs and then adding second text.
Now adding a new line and adding first text + tabs + second text.
It looks like this:
Model :\t \t \t \t \t XXXX
Version :\t \t \t \t YYYY
Note : I am not able to put white spaces here so just putted \t.
Assume that the first X and first Y starting position is equal.
Alignment is coming properly for English.
But if the input texts are in Chinese then it comes like this :
Model :\t \t \t \t \t XXXX
Version :\t \t \t \t YYYY
Here YYYY is not coming just below XXXX such that the start position of first X and first Y should be same,
This Tab spaces are the same for different languages.
I want atleast alignment should be proper with every languages.
Thanks in Advance..
Piyush Vaishnav
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