SetGlobal, GetGlobal from DLL

streak

#1

1/27/2012 9:27 PM

Is any 'Reference' other than 'WealthLab' required to access 'GetGlobal', 'SetGlobal' etc from within a dll?

(I'm trying to write a dll to cover what the following script does such that it only loads the txt once per WLD session, and can return 2 vars (market capitalisation & shares issued), and display a label unless a bool is switched.

Having red wavy lines trouble just trying to get started though.

Size:

Color:

Is any 'Reference' other than 'WealthLab' required to access 'GetGlobal', 'SetGlobal' etc from within a dll?

(I'm trying to write a dll to cover what the following script does such that it only loads the txt once per WLD session, and can return 2 vars (market capitalisation & shares issued), and display a label unless a bool is switched.

Having red wavy lines trouble just trying to get started though.
[CODE]
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using WealthLab;
using WealthLab.Indicators;

namespace WealthLab.Strategies
{
public class MyStrategy : WealthScript
{
public bool haveSecData = false;
Dictionary<string, string> SecData = new Dictionary<string, string>();
public long MarketCapitalisation = 0;
public long TotalIssue = 0;
Font font = new Font("Lucida Console", 8, FontStyle.Regular);	//Courier New	Lucida Console	Lucida Sans Unicode

protected override void Execute()
{
  PadBars(12);
  if (haveSecData == false)
  {
    string path = @"D:\Databases\DB_ASXeodIT_Logs\MarketCapAndTotalIssue.txt"; 
    System.IO.StreamReader reader; 
    if ( System.IO.File.Exists(path) == true )
    {
      reader = new System.IO.StreamReader(path);
      int idx = -1;
      string line = string.Empty;
      try
      {
        while (reader.EndOfStream == false)
        {
          line = reader.ReadLine();
          idx = line.IndexOf(',');
          SecData.Add(line.Substring(0, idx), line.Substring(idx + 1));
        }
      }
      catch
      {
        PrintDebug(line);
      }
      reader.Close();		
    }
    haveSecData = true;
  }
  if( SecData.ContainsKey( Bars.Symbol ) )
  {
    string[] tokens = SecData[ Bars.Symbol ].Split(',');
    int idx = SecData[ Bars.Symbol ].IndexOf(',');
    string sMarkC = "$ ##,###,###";
    string sTotalI = "###,###,###";
    long markC = long.Parse( tokens[1] );
    long totalI = long.Parse( tokens[2] );
    MarketCapitalisation = markC;
    TotalIssue = totalI;
    if(markC >= 10000000)
    {
      markC = (markC / (long)1000000);
      sMarkC = "$ ###,### M";
    }
    if(totalI >= 500000000)
    {
      totalI = (totalI / (long)1000000);
      sTotalI = "###,### M";
    }
    string lines = string.Concat(tokens[0],Environment.NewLine, "Market Cap:".PadRight(12), markC.ToString(sMarkC).PadLeft(14),Environment.NewLine, "Total Issue:".PadRight(12) , totalI.ToString(sTotalI).PadLeft(14) );

DrawText( PricePane, lines, 0, 26, Color.Black, Color.FromArgb(10, Color.Blue), font);
    // or DrawLabel( PricePane, lines );
    // PrintDebug(String.Format("{0}   mCap: {1:###,###,###,###,###},    totIssue:  {2:###,###,###,###,###}", Bars.Symbol, MarketCapitalisation, TotalIssue));
    }
  }
[/CODE]

Eugene

#2

1/28/2012 1:01 AM

If my understanding is correct, you want this method to reside in an external library (a la Community Components), to reuse the WealthScript commands such as DrawText at the same time, and to be accessible in Strategies.

If that's the point, your code-based Strategies should pass an instance of the WealthScript object to your DLL for this to work.

Example 1:

Example 2 by Aleksey:

As this technique is widely used in Community.Components to access the WealthScript methods, I recommend to take a closer look at its source code. Take DrawLinRegChannel for example:

What you saw above is a working example of calling a WealthScript method, similar to SetGlobal or DrawText, in a DLL.

Now, in a WealthScript Strategy you do like the following snippet shows; as I said, the idea is to pass a WealthScript instance to your DLL:

DrawLinRegChannel

I hope you see what I mean, because there's no way I could make it clearer.

Size:

Color:

If my understanding is correct, you want this method to reside in an external library (a la Community Components), to reuse the WealthScript commands such as DrawText at the same time, and to be accessible in Strategies.

If that's the point, your code-based Strategies should [b]pass an instance of the WealthScript object to your DLL[/b] for this to work.

Example 1:
[code]namespace WealthLab.Strategies
{
	public class Testing : WealthScript
	{
		protected override void Execute()
		{
			test.testFunc(this);
		}
	}
	
	class test
	{
		public static void testFunc(WealthScript obj)
		{
			obj.PrintDebug("testing");
		}
	}
}[/code]

Example 2 by Aleksey:
[code]namespace WealthLab.Strategies
{
	public class Testing : WealthScript
	{
		protected override void Execute()
		{
			// passing WealthScript by reference into the class 'test'
			test aTest = new test(this as WealthScript);
			aTest.testFunc();
		}
	}

class test
	{
		private WealthScript _ws;
                
		public test(WealthScript ws)
		{
			_ws = ws;
		}
                
		public void testFunc()
		{
			_ws.PrintDebug("test.testFunc");
		}
	}
}
[/code]

As this technique is widely used in Community.Components to access the WealthScript methods, I recommend to take a closer look at its source code. Take [i]DrawLinRegChannel[/i] for example:
[CODE]public class Calculate
    {
        WealthScript obj;

public Calculate(WealthScript obj)
        {
            this.obj = obj;
        }

//...

public void DrawLinRegChannel(int bar, DataSeries series, int period, double width, Color color, LineStyle style, int line)
        {
                //...
            obj.DrawLine(obj.PricePane, bar - (period - 1), Intercept - Slope - width, bar, Intercept - width, color, style, line);

[/CODE]
What you saw above is a working example of calling a WealthScript method, similar to SetGlobal or DrawText, in a DLL.

Now, in a WealthScript Strategy you do like the following snippet shows; as I said, the idea is to pass a WealthScript instance to your DLL:

[LINK=http://www2.wealth-lab.com/WL5WIKI/DrawLinRegChannel.ashx]DrawLinRegChannel[/LINK]

[CODE]protected override void Execute()
{
	Calculate calc = new Calculate[b](this); // pass WealthScript as "this"[/b]
	//...
			
	calc.DrawLinRegChannel( bar, AveragePrice.Series(Bars), 45, 2, Color.FromArgb(30, col), LineStyle.Solid, 1 );
}[/CODE]

I hope you see what I mean, because there's no way I could make it clearer.

streak

#3

2/3/2012 3:37 AM

Thanks Eugene, yes you have read my concept correctly;

- The code above was to demonstrate what was needed in a dll.
- I have been able to pass an instance of WealthScript.

Finally have the code below working.

Only problem is that when Wld opens with the default workspace including a reference to the dll the Dictionary does not seem to have loaded to return data for the current symbol, and its not until the next symbol is loaded that all seems to be working fine.

Any ideas for a fix, please?

Someone may find this 'template' useful; I can generate a table of current company names, market capitalisations and total issues, each week. Then plot a label of the details and/or I guess use the details to filter Datasets - but haven't tried yet.

Sample .txt

Ah. bug. Where a symbol is not in the table a label is not drawn but the values are carried from the previous symbol. Must nuke it.

Size:

Color:

Thanks Eugene, yes you have read my concept correctly;

- The code above was to demonstrate what was needed in a dll.
- I have been able to pass an instance of WealthScript.

Finally have the code below working.

Only problem is that when Wld opens with the default workspace including a reference to the dll the Dictionary does not seem to have loaded to return data for the current symbol, and its not until the next symbol is loaded that all seems to be working fine.

Any ideas for a fix, please?

Someone may find this 'template' useful; I can generate a table of current company names, market capitalisations and total issues, each week. Then plot a label of the details and/or I guess use the details to filter Datasets - but haven't tried yet.

Sample .txt 
[QUOTE]
ACP,Audalia Resources Limited FPO,2832000,14160001
ACR,Acrux Limited FPO,559428949,166496711
ACS,Accent Resources NL FPO,57955078,173000233
ACU,Acuvax Limited FPO,4914191,2457095319
ACW,Actinogen Limited FPO,2523221,50464426
[/QUOTE]

[CODE]

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Globalization;
using System.ComponentModel;
using WealthLab;

namespace WLjonmac.asxMktCap
{
  public class asxMCap 
  {
    public static int SymChanges;
    public static int ListReLoads;   
    private static Dictionary<string, string> SecData; 
    private static string sDictionaryErrs;
    private static string sLabelText;

WealthScript ws;
    public asxMCap(WealthScript ws)
    {
      this.ws = ws;
      BarSymb = ws.Bars.Symbol;
      SymChanges = 0;
      ListReLoads = 0;
      SecData = new Dictionary<string, string>();
      sDictionaryErrs = string.Empty;
      sLabelText = string.Empty;
      DisplayLabel = true;
    }

#region - Load Dictionary -
        
    private void LoadList()    
    {          
      string path = @"C:\MarketCapAndTotalIssue.txt";
      System.IO.StreamReader reader;
      if (System.IO.File.Exists(path) == true)
      {
        reader = new System.IO.StreamReader(path);
        int idx = -1;
        string line = string.Empty;
        ListReLoads ++;                                                         
        ws.PrintDebug( String.Format("List reload cnt: {0} {1}",
          ListReLoads, _symb));
        try
        {
          while (reader.EndOfStream == false)
          {
            try
            {
              line = reader.ReadLine();
              idx = line.IndexOf(',');
              SecData.Add(line.Substring(0, idx), line.Substring(idx + 1));
            }
            catch
            {
              sDictionaryErrs += "err?: " + line + Environment.NewLine;
            }
          }
          ws.SetGlobal("SecData", SecData);
        }
        catch ( System.Exception ex ) 
        {
          DisplayLabel = false;
          sDictionaryErrs += "Problem reading .txt or setting global."
            +  Environment.NewLine + "System exception: " + ex.Message;
        }
        finally
        {
          reader.Close();
          if( sDictionaryErrs.Length > 0)
          {
            ws.PrintDebug( sDictionaryErrs );
          }
        }
      }
    }

#endregion

#region - Extract line values -
        
    private void splitValues(string sym)
    {
      string _line;
      string[] tokens;
      try
      {
        Dictionary<string, string> SecData2 =
          (Dictionary<string, string>)ws.GetGlobal("SecData");
        if (SecData2.TryGetValue(sym, out _line))
        {
          try
          {
            tokens = _line.Split(',');
            CompanyName = tokens[0];
            MktCapitalisation = long.Parse(tokens[1]);
            TotalIssue = long.Parse(tokens[2]);
            if (DisplayLabel == true)
            {
              CreateChartLabel(CompanyName, MktCapitalisation, TotalIssue);
              DrawChartLabel();
            }
          }
          catch
          {
            ws.PrintDebug(" Problem splitting values at splitValues() ");
          }
        }
      }
      catch (System.Exception ex) 
      {
        ws.PrintDebug("Problem in method splitValues() "
          + Environment.NewLine + ex.Message );
      }
    }

#endregion

#region - Create chart label -

private string CreateChartLabel(string Co, long Mcap, long TotIss)
    {
      string sMarkC = "$ ##,###,###"; 
      string sTotalI = "###,###,###";
      if (MktCapitalisation >= 10000000) 
      {
        MktCapitalisation = (MktCapitalisation / (long)1000000);
        sMarkC = "$ ###,### M";
      }
      if (TotalIssue >= 500000000)
      {
        TotalIssue = (TotalIssue / (long)1000000);
        sTotalI = "###,### M";
      }
      sLabelText = string.Concat(CompanyName,
        Environment.NewLine, "Market Cap:".PadRight(12),
        MktCapitalisation.ToString(sMarkC).PadLeft(14),
        Environment.NewLine, "Total Issue:".PadRight(12),
        TotalIssue.ToString(sTotalI).PadLeft(14));
      return sLabelText;
    }
        
    #endregion

#region - Draw chart label -
        
    private void DrawChartLabel()
    {
            //Courier New       Lucida Console  Lucida Sans Unicode
      Font font = new Font("Lucida Console", 8, FontStyle.Regular);
      //ws.DrawText( ws.PricePane, sLabelText, 0, 26, Color.Black,
      //  Color.FromArgb(10, Color.Blue), font);
      // or
      ws.DrawLabel( ws.PricePane, sLabelText );
    }

#endregion

#region - Properties -

public static string _symb;
    public string BarSymb
    {
      get
      {
          return _symb; 
      }
      set
      {
        if (value != _symb)
        {
          _symb = value;
          //OnSymbolChanged("BarSymb");   //  OnPropertyChanged(
          try
          {
            if (ws.GetGlobal("SecData") == null)
            {
              LoadList();
              SymChanges++;
              ws.PrintDebug(String.Format("Symbol Property Changes {0} {1}",
                SymChanges, _symb));
            }
            splitValues(value);
          }
          catch
          {
            ws.PrintDebug( "Could not draw label." ); 
          }
        }
      }
    }

private static string _CoName;
    public string CompanyName
    {
      get
      {
        return _CoName; 
      }
      private set
      {
        if (value != _CoName)
        {
          _CoName = value; 
        }
      }
    }

private static long _MCap;
    public long MktCapitalisation
    {
      get
      {
        return _MCap; 
      }
      private set
      {
        if (value != _MCap)
        {
          _MCap = value;
        }
      }
    }

private static long _TotIssue;
    public long TotalIssue 
    {
      get
      {
        return _TotIssue; 
      }
      private set
      {
        if (value != _TotIssue)
        {
          _TotIssue = value; 
        }
      }
    }

private static bool _displayLbl;
    public bool DisplayLabel 
    {
      get
      {
        return _displayLbl; 
      }
      private set
      {
        if (value != _displayLbl)
        {
          _displayLbl = value; 
        }
      }
    }

#endregion
  }
}

[/CODE]

Ah. bug. Where a symbol is not in the table a label is not drawn but the values are carried from the previous symbol. Must nuke it.

streak

#4

2/3/2012 11:37 PM

made the follow edits (but still have the table not loading as the first symbol plots)

Size:

Color:

made the follow edits (but still have the table not loading as the first symbol plots)

[CODE]

public class asxMCap 
  {
    private static int numSymChanges;	//changed
    private static int numListReLoads;	//changed   
    ...
    public asxMCap(...)
    {
      ..
      //numSymChanges = 0;
      //numListReLoads = 0;
      ...
      LoadList();	//added
    }

private void LoadList()    
    {
      if (ws.GetGlobal("SecData") == null)
      {
	...
        if (System.IO.File.Exists(path) == true)
        {
	  ...
          numListReLoads++;

}

private void splitValues(string sym)
    {
      ...
      try
	...

if ( ... )
        {
	  try
	  {
	  }
	  catch
	  {
	  }
	  ...
        }
        else
        {
          CompanyName = "";
          MktCapitalisation = -1;
          TotalIssue = -1;
        }
      }
	...

private string CreateChartLabel(...)
    {
      ...

if (Mcap >= 10000000) 
      {
        Mcap = (Mcap / (long)1000000);
        ...
      }
      if (TotIss >= 500000000)
      {
        TotIss = (TotIss / (long)1000000);
        ...
      }
      ...
    }

public string BarSymb
    {
      get
        ...
      set
      {
        if (...)
        {
	  ...

numSymChanges++;
	  ...

try
          {
            if (ws.GetGlobal("SecData") != null)
            {
              splitValues(value);
            }
          }
          catch
          {
            ...
          }
        }

// added;

public int SymChanges 
    {
      get { return numSymChanges; }
    }

public int ListReLoads 
    {
      get { return numListReLoads; }
    }

[/CODE]

streak

#5

2/4/2012 5:03 AM

another version, without using SetGlobal(), but still not operating on first symbol! (?)

Size:

Color:

another version, without using SetGlobal(), but still not operating on first symbol!  (?)

[CODE]
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Globalization;
using System.ComponentModel;
using WealthLab;

namespace WLjonmac.asxMktCap
{

public sealed class SingletonPattern
  {
    private SingletonPattern()
    {
      GetUserInfo();
    }
    private static readonly SingletonPattern instance = new SingletonPattern();
    public static SingletonPattern GlobalInstance
    {
      get { return instance; }
    }
    private Dictionary<string, string> _userData = new Dictionary<string, string>();
    public Dictionary<string, string> UserData
    {
      get { return _userData; }
    }
    private void GetUserInfo()
    {
      string path = @"C:\MarketCapAndTotalIssue.txt";
      System.IO.StreamReader reader;
      if (System.IO.File.Exists(path) == true)
      {
        reader = new System.IO.StreamReader(path);
        int idx = -1;
        string line = string.Empty;
        try
        {
          while (reader.EndOfStream == false)
          {
            try
            {
              line = reader.ReadLine();
              idx = line.IndexOf(',');
              _userData.Add(line.Substring(0, idx), line.Substring(idx + 1));
            }
            catch
            {
            }
          }
        }
        catch
        {
        }
        finally
        {
          reader.Close();
        }
      }
    }
  }

public class asxMCap
  {
    private static Dictionary<string, string> SecData;
    SingletonPattern _secData;
    WealthScript ws;

public asxMCap(WealthScript ws)
    {
      this.ws = ws;
      BarSymb = ws.Bars.Symbol;
      _secData = SingletonPattern.GlobalInstance;
      SecData =  _secData.UserData;
      DisplayLabel = true;
    }

#region - Extract line values -

private void splitValues(string sym)
    {
      string _line;
      string[] tokens;
      try
      {
        if (SecData.TryGetValue(sym, out _line))
        {
          try
          {
            tokens = _line.Split(',');
            CompanyName = tokens[0];
            MktCapitalisation = long.Parse(tokens[1]);
            TotalIssue = long.Parse(tokens[2]);
            if (DisplayLabel == true)
            {
              CreateChartLabel(CompanyName, MktCapitalisation, TotalIssue);
            }
          }
          catch
          {
            ws.PrintDebug(" Problem in method splitValues() for " + sym);
          }
        }
        else
        {
          CompanyName = "";
          MktCapitalisation = -1;
          TotalIssue = -1;
        }
      }
      catch (System.Exception ex)
      {
        ws.PrintDebug("Problem in method splitValues() for " + sym + ". "
          + Environment.NewLine + ex.Message);
      }
    }

#endregion

#region - Create chart label -

private void CreateChartLabel(string Co, long Mcap, long TotIss)  // string
    {
      //Courier New	Lucida Console	Lucida Sans Unicode
      Font font = new Font("Lucida Console", 8, FontStyle.Regular);
      string sMarkC = "$ ##,###,###";
      string sTotalI = "###,###,###";
      if (Mcap >= 10000000)
      {
        Mcap = (Mcap / (long)1000000);
        sMarkC = "$ ###,### M";
      }
      if (TotIss >= 500000000)
      {
        TotIss = (TotIss / (long)1000000);
        sTotalI = "###,### M";
      }
      string sLabelText = string.Concat(CompanyName,
        Environment.NewLine, "Market Cap:".PadRight(12),
        MktCapitalisation.ToString(sMarkC).PadLeft(14),
        Environment.NewLine, "Total Issue:".PadRight(12),
        TotalIssue.ToString(sTotalI).PadLeft(14));
      //return sLabelText;
      //ws.DrawText( ws.PricePane, sLabelText, 0, 26, Color.Black,
      //  Color.FromArgb(10, Color.Blue), font);
      // or
      ws.DrawLabel(ws.PricePane, sLabelText);
    }

#endregion

#region - Properties -

public static string _symb;
    public string BarSymb
    {
      get
      {
        return _symb;
      }
      set
      {
        if (value != _symb)
        {
          _symb = value;
          try
          {
            if ( SecData != null ) 
            {
              splitValues(value);
            }
          }
          catch
          {
            ws.PrintDebug("Symbol Properety Change: " 
	      + "Could not LoadList() splitValus().");
          }
        }
      }
    }

private static string _CoName;
    public string CompanyName
    {
      get
      {
        return _CoName;
      }
      private set
      {
        if (value != _CoName)
        {
          _CoName = value;
        }
      }
    }

private static long _MCap;
    public long MktCapitalisation
    {
      get
      {
        return _MCap;
      }
      private set
      {
        if (value != _MCap)
        {
          _MCap = value;
        }
      }
    }

private static long _TotIssue;
    public long TotalIssue
    {
      get
      {
        return _TotIssue;
      }
      private set
      {
        if (value != _TotIssue)
        {
          _TotIssue = value;
        }
      }
    }

private static bool _displayLbl;
    public bool DisplayLabel
    {
      get
      {
        return _displayLbl;
      }
      private set
      {
        if (value != _displayLbl)
        {
          _displayLbl = value;
        }
      }
    }

#endregion
  }

}

[/CODE]

streak

#6

2/4/2012 7:10 PM

Have now fixed where the first chart plotted was not drawing the label. Was easy to find after getting debugging operative in VS Express (had a space at the end *csproj.user file path like

Dumb. Anyway, fwiw, the sequence of statements in the constructor was 'off', now ...

streak

#7

2/5/2012 9:16 PM

A couple of other fixes;

Re plotting the same symbol was loosing the ws DrawLabel. So changed CreateChartLabel() from void to a string parked in a new property. And implemented the ws DrawLabel within the symbol property change to a reinstated DrawChartLabel(). This method is not necessary but could add an alternative like DrawText instead.

The values plotted were wrong - fixed the assigning vars.

Also wondering about speed and used StringBuilder instead of .Concat, removed the test for Dictionary != null in the symbol change property (negligible no doubt).

Size:

Color:

A couple of other fixes;

Re plotting the same symbol was loosing the ws DrawLabel. So changed CreateChartLabel() from void to a string parked in a new property. And implemented the ws DrawLabel within the symbol property change to a reinstated DrawChartLabel(). This method is not necessary but could add an alternative like DrawText instead.

The values plotted were wrong - fixed the assigning vars.

Also wondering about speed and used StringBuilder instead of .Concat, removed the test for Dictionary != null in the symbol change property (negligible no doubt).

[CODE]
    private void splitValues(string sym)
    {
      string _line;
      string[] tokens;
      try
      {
        if (SecData.TryGetValue(sym, out _line))
        {
          try
          {
            tokens = _line.Split(',');
            CompanyName = tokens[0];
            MktCapitalisation = long.Parse(tokens[1]);
            TotalIssue = long.Parse(tokens[2]);
            if (DisplayLabel == true)
            {
             LblText = CreateChartLabel(CompanyName, MktCapitalisation, TotalIssue);	// <<<<<
            }
          }
          catch
          {
            ws.PrintDebug(" Problem in method splitValues() for " + sym);		// <<<<<
          }
        }
        else
        {
          CompanyName = "";
          MktCapitalisation = -1;
          TotalIssue = -1;
          LblText = string.Empty;							// <<<<<
        }
      }
      catch (System.Exception ex)
      {
        ws.PrintDebug("Problem in method splitValues() for " + sym + ". "
          + Environment.NewLine + ex.Message);
      }
    }

private string CreateChartLabel(string Co, long Mcap, long TotIss)    // void
    {
      string sLine2Caption = "Market Cap:".PadRight(12);
      string sLine3Caption = "Total Issue:".PadRight(12);
      string sMarkC = "$ ##,###,###";
      string sTotalI = "###,###,###";
      string sMC = string.Empty;
      string sTI = string.Empty;
      if (Mcap >= 10000000)
      {
        Mcap = (Mcap / (long)1000000);
        sMarkC = "$ ###,### M";
      }
      sMC = Mcap.ToString(sMarkC).PadLeft(14);
      if (TotIss >= 500000000)
      {
        TotIss = (TotIss / (long)1000000);
        sTotalI = "###,### M";
      }
      sTI = TotIss.ToString(sTotalI).PadLeft(14);
      StringBuilder sBuild = new StringBuilder();
      sBuild.Append( CompanyName );
      sBuild.AppendLine();
      sBuild.Append(sLine2Caption);
      sBuild.Append(sMC);
      sBuild.AppendLine();
      sBuild.Append(sLine3Caption);
      sBuild.Append(sTI);
      return  sBuild.ToString();
    }

private void DrawChartLabel()
    {
      ws.DrawLabel(ws.PricePane, LblText); 
    }

private static string _symb;      //  public
    public string BarSymb
    {
      get
      {
        return _symb;
      }
      private set
      {
        if (value != _symb)
        {
          _symb = value;
          try
          {
            splitValues(value);
          }
          catch
          {
            ws.PrintDebug("BarSymb property change: "
              + "Could not splitValus().");
          }
        }
        if( !string.IsNullOrEmpty(LblText) )
        {
          DrawChartLabel();
        }
      }
    }

private static string _slblText; 
    private string LblText    
    {
      get
      {
        return _slblText;
      }
      set
      {
        if ( value != _slblText )
        {
          _slblText = value;
        }
      }
    }

[/CODE]

Eugene

#8

2/6/2012 12:27 AM

Yep, StringBuilder can offer a substantial performance benefit when working with large number of strings.

streak

#9

2/6/2012 1:34 AM

Yes. Dotnetperls.com has much good quick help for C#, including speed testing on various things. Eg .Concat can be faster when concatenating less than 4 strings, but above 4 StringBuilder is it.