很久没发代码了，今天来发些C#代码

最新推荐文章于 2025-04-12 16:15:34 发布
yyf9989
最新推荐文章于 2025-04-12 16:15:34 发布
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文章标签： c# system forms windows string null
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	// 南京千里独行 2005-3-17	
		
	/// <summary>
	/// 进度信息处理委托
	/// </summary>
	/// <param name="CompletedStep" type="int">已经完成的步骤数</param>
	/// <param name="TotalStep" type="int">总的步骤数</param>
	public delegate void ProgressHandler( int CompletedStep , int TotalStep );
	
	/// <summary>
	/// 通用函数集合
	/// </summary>
	public class YYFCommon
	{
		/// <summary>
		/// 向指定URL使用POST方法发送数据的例程,本函数不进行错误处理
		/// </summary>
		/// <param name="strURL">URL字符串</param>
		/// <param name="bytSend">要发送的二进制数据</param>
		/// <param name="SendProgress">发送数据时的进度处理</param>
		/// <param name="AcceptProgress">接受数据时的进度处理</param>
		/// <returns>接受到的二进制数据</returns>
		public static byte[] HttpPostData(
			string strURL ,
			byte[] bytSend ,
			ProgressHandler SendProgress ,
			ProgressHandler AcceptProgress )
		{
			// 发送数据
			System.Net.HttpWebRequest myReq =(System.Net.HttpWebRequest) System.Net.WebRequest.Create( strURL );
			myReq.Method = "POST" ;
			System.IO.Stream myStream = myReq.GetRequestStream();
			int iCount = 0 ;
			if( SendProgress != null)	
				SendProgress( 0 , bytSend.Length );
			while( iCount < bytSend.Length )
			{
				if( iCount + 1024 > bytSend.Length)
				{
					myStream.Write(bytSend, iCount , bytSend.Length - iCount );
					iCount = bytSend.Length ;
				}
				else
				{
					myStream.Write(bytSend , iCount , 1024);
					iCount += 1024;
				}
				if( SendProgress != null)	
					SendProgress( iCount , bytSend.Length );
			}//while
			if( SendProgress != null)	
				SendProgress( bytSend.Length  , bytSend.Length );
			myStream.Close();
			
			// 接受数据
			System.Net.HttpWebResponse myRes = null;
			myRes = myReq.GetResponse() as System.Net.HttpWebResponse ;
				
			myStream = myRes.GetResponseStream();
			System.IO.MemoryStream myBuf = new System.IO.MemoryStream(1024);
			byte[] bytBuf = new byte[1024];
			int ContentLength = (int)myRes.ContentLength ;
			int AcceptLength = 0 ;
			if( AcceptProgress != null)
				AcceptProgress(0 , ContentLength );
			while(true)
			{
				int iLen = myStream.Read(bytBuf,0,1024);
				if(iLen ==0)
					break;
				myBuf.Write(bytBuf,0,iLen);
				AcceptLength += iLen ;
				if( AcceptLength > ContentLength )
					ContentLength = AcceptLength ;
				if( AcceptProgress != null)
					AcceptProgress( AcceptLength , ContentLength );
			}//while
			if( AcceptProgress != null)
				AcceptProgress( AcceptLength , ContentLength );
			myStream.Close();
			myRes.Close();
			myReq.Abort();
			byte[] bytReturn = myBuf.ToArray();
			myBuf.Close();
			return bytReturn ;
		}// public static byte[] HttpPostData()
		
		
		/// <summary>
		/// 根据保存在一个列表中的数据源参数修正字符串
		/// </summary>
		/// <param name="strText">供处理的原始字符串</param>
		/// <param name="strHead">标记的头字符串</param>
		/// <param name="strEnd">标记尾字符串</param>
		/// <param name="myKeys">保存所有参数的列表</param>
		/// <returns>处理后的字符串</returns>
		public static string fixVariableString
			( string strText,
			string strHead,
			string strEnd,
			System.Collections.Hashtable myKeys )
		{
			// 若原始字符串无效或者没有任何可用的参数则退出函数
			if(    strText 			== null
				|| strHead			== null
				|| strEnd 			== null
				|| strHead.Length	== 0
				|| strEnd.Length	== 0
				|| strText.Length	== 0
				|| myKeys 			== null
				|| myKeys.Count		== 0 )
				return strText ;
			
			int 	index = strText.IndexOf( strHead );
			// 若原始字符串没有变量标记则退出函数
			if(index < 0 )
				return strText ;
			
			string 	strKey ;
			int 	index2 ;
			int 	LastIndex = 0 ;
			System.Text.StringBuilder myStr = new System.Text.StringBuilder();
			do
			{	
				// 查找有 "[内容]" 样式的子字符串
				// 若没有找到 "[" 和 "]"的字符对则退出循环
				index2 = strText.IndexOf( strEnd ,  index + 1  );
				if(index2 > index)
				{
					// 若 "[" 符号后面出现 "]"符号则存在 "[]"字符对
					// 修正查找结果以保证 "[]"字符对中不出现字符 "["
					int index3 = index ;
					do
					{
						index = index3 ;
						index3 = strText.IndexOf(strHead, index3 + 1 );
					}while( index3 > index && index3 < index2 ) ;
				
					// 获得字符对夹着的子字符串,该子字符串为参数名
					// 若该参数名有效则向输出结果输出参数值
					// 否则不进行额外的处理
					strKey = strText.Substring(index + strHead.Length ,  index2 - index - strHead.Length  );
					if( myKeys.ContainsKey( strKey ))
					{	
						if(LastIndex < index)
						{
							myStr.Append( strText.Substring(LastIndex, index - LastIndex ));
						}
						myStr.Append( myKeys[strKey] as string );
						index = index2 +  strEnd.Length ;
						LastIndex = index ;
					}
					else
						index = index2 + strEnd.Length ;
				}
				else
				{
					break;
				}
			}while( index >=0 && index < strText.Length );
			// 添加处理过后剩余的字符串
			if(LastIndex < strText.Length   )
				myStr.Append( strText.Substring(LastIndex));
			return myStr.ToString();	
		}// End of function : fixVariableString
		
		
		/// <summary>
		/// 计算指定矩形的拖拽控制矩形
		/// </summary>
		/// <param name="myRect">主矩形区域</param>
		/// <param name="DragRectSize">拖拽矩形的大小</param>
		/// <param name="InnerDragRect">拖拽矩形是否在主矩形内部,若为false则拖拽矩形外翻</param>
		/// <remarks>
		/// 拖拽矩形主要用于有用户参与的图形化用户界面,在一个矩形区域的的4个顶点和边框中间点共有8个控制点
		/// 用户使用鼠标拖拽操作来拖动这8个控制点可以用于改变矩形区域的位置和大小,这些控制点可以在区域区域的内部,
		/// 也可在矩形区域的外部,拖拽矩形有8个,分别编号从0至7
		/// <pre>
		///               内拖拽矩形
		/// ┌─────────────────┐
		/// │■0            1■             2■│
		/// │                                  │
		/// │                                  │
		/// │                                  │
		/// │                                  │
		/// │■7                            3■│
		/// │                                  │
		/// │                                  │
		/// │                                  │
		/// │                                  │
		/// │■6           5■              4■│
		/// └─────────────────┘
		///
		///              外拖拽矩形
		///
		/// ■               ■                  ■
		///   ┌────────────────┐
		///   │0            1                 2│
		///   │                                │
		///   │                                │
		///   │                                │
		///   │                                │
		/// ■│7                              3│■
		///   │                                │
		///   │                                │
		///   │                                │
		///   │                                │
		///   │6             5               4 │
		///   └────────────────┘
		/// ■                ■                 ■
		/// </pre>
		/// </remarks>
		/// <returns>拖拽矩形的数组,有8个元素</returns>
		public static System.Drawing.Rectangle[] GetDragRects(System.Drawing.Rectangle myRect , int DragRectSize , bool InnerDragRect)
		{
			System.Drawing.Rectangle[] DragRects = new System.Drawing.Rectangle[8];
			if( InnerDragRect)
			{
				DragRects[0] = new System.Drawing.Rectangle( myRect.X , myRect.Y , DragRectSize , DragRectSize );
				DragRects[1] = new System.Drawing.Rectangle( myRect.X + (int)((myRect.Width - DragRectSize)/2) , myRect.Y , DragRectSize , DragRectSize );
				DragRects[2] = new System.Drawing.Rectangle( myRect.Right - DragRectSize , myRect.Y , DragRectSize , DragRectSize );
				DragRects[3] = new System.Drawing.Rectangle( myRect.Right - DragRectSize , myRect.Y + (int)(( myRect.Height - DragRectSize)/2)  , DragRectSize , DragRectSize );
				DragRects[4] = new System.Drawing.Rectangle( myRect.Right - DragRectSize , myRect.Bottom - DragRectSize , DragRectSize , DragRectSize );
				DragRects[5] = new System.Drawing.Rectangle( myRect.X + (int)((myRect.Width - DragRectSize)/2) , myRect.Bottom - DragRectSize , DragRectSize , DragRectSize );
				DragRects[6] = new System.Drawing.Rectangle( myRect.X  , myRect.Bottom - DragRectSize , DragRectSize , DragRectSize );
				DragRects[7] = new System.Drawing.Rectangle( myRect.X  , myRect.Y + (int)(( myRect.Height - DragRectSize)/2 ) , DragRectSize , DragRectSize );
			}
			else
			{
				DragRects[0] = new System.Drawing.Rectangle( myRect.X - DragRectSize , myRect.Y - DragRectSize , DragRectSize , DragRectSize );
				DragRects[1] = new System.Drawing.Rectangle( myRect.X + (int)((myRect.Width - DragRectSize)/2) , myRect.Y - DragRectSize , DragRectSize , DragRectSize );
				DragRects[2] = new System.Drawing.Rectangle( myRect.Right  , myRect.Y - DragRectSize , DragRectSize , DragRectSize );
				DragRects[3] = new System.Drawing.Rectangle( myRect.Right  , myRect.Y + (int)(( myRect.Height - DragRectSize)/2)  , DragRectSize , DragRectSize );
				DragRects[4] = new System.Drawing.Rectangle( myRect.Right  , myRect.Bottom  , DragRectSize , DragRectSize );
				DragRects[5] = new System.Drawing.Rectangle( myRect.X + (int)((myRect.Width - DragRectSize)/2) , myRect.Bottom  , DragRectSize , DragRectSize );
				DragRects[6] = new System.Drawing.Rectangle( myRect.X - DragRectSize , myRect.Bottom  , DragRectSize , DragRectSize );
				DragRects[7] = new System.Drawing.Rectangle( myRect.X - DragRectSize  , myRect.Y + (int)(( myRect.Height - DragRectSize)/2 ) , DragRectSize , DragRectSize );
			}
			return DragRects ;
		}

		/// <summary>
		/// 计算拖拉矩形上的鼠标光标位置
		/// </summary>
		/// <remarks>
		/// 鼠标设置如下
		/// 西北-东南          南北                东北-西南
		///	   ■               ■                  ■
		///     ┌────────────────┐
		///     │0            1                 2│
		///     │                                │
		///     │                                │
		///     │                                │
		///     │                                │
		///   ■│7 西-南                        3│■ 西-南
		///     │                                │
		///     │                                │
		///     │                                │
		///     │                                │
		///     │6             5               4 │
		///     └────────────────┘
		///   ■                ■                 ■
		/// 东北-西南          南北                   西北-东南
		/// </remarks>
		/// <param name="index">拖拽矩形的序号,从0至7</param>
		/// <returns>鼠标光标对象,若序号小于0或大于7则返回空引用</returns>
		public static System.Windows.Forms.Cursor GetDragRectCursor( int index )
		{
			switch(index)
			{
				case 0:
					return System.Windows.Forms.Cursors.SizeNWSE ;
				case 1:
					return System.Windows.Forms.Cursors.SizeNS ;
				case 2:
					return System.Windows.Forms.Cursors.SizeNESW ;
				case 3:
					return System.Windows.Forms.Cursors.SizeWE ;
				case 4:
					return System.Windows.Forms.Cursors.SizeNWSE ;
				case 5:
					return System.Windows.Forms.Cursors.SizeNS ;
				case 6:
					return System.Windows.Forms.Cursors.SizeNESW ;
				case 7:
					return System.Windows.Forms.Cursors.SizeWE ;
			}
			return null;
		}
	}
	
	/// <summary>
	/// 操作系统剪切板处理模块,提供的方法为静态函数
	/// </summary>
	/// <example>
	/// C#语言中使用该类的例子,从操作系统剪切板获得纯文本数据
	/// // 判断操作系统剪切板是否保存了纯文本数据
	/// if( ClipboardHandler.CanGetText())
	/// {
	///		// 返回获得的纯文本数据
	///		return ClipboardHandler.GetTextFromClipboard();
	/// }
	///
	/// 向操作系统剪切板设置纯文本数据
	/// string strText = "要设置的纯文本数据";
	/// ClipboardHandler.SetTextToClipboard( strText );
	/// </example>
	public class ClipboardHandler
	{

		/// <summary>
		/// 是否可以从操作系统剪切板获得文本
		/// </summary>
		/// <returns>true 可以从操作系统剪切板获得文本,false 不可以</returns>
		public static  bool CanGetText()
		{
			// Clipboard.GetDataObject may throw an exception...
			try
			{
				System.Windows.Forms.IDataObject data = System.Windows.Forms.Clipboard.GetDataObject();
				return data != null && data.GetDataPresent(System.Windows.Forms.DataFormats.Text);
			}
			catch (Exception e)
			{
				return false;
			}
		}
//
//		/// <summary>
//		/// 是否可以向操作系统剪切板设置文本
//		/// </summary>
//		/// <returns></returns>
//		public static bool CanSetText()
//		{
//			return true;
//		}

		/// <summary>
		/// 向操作系统剪切板设置文本数据
		/// </summary>
		/// <param name="strText">文本数据</param>
		/// <returns>操作是否成功</returns>
		public static  bool SetTextToClipboard(string strText)
		{
			if (  strText != null && strText.Length > 0 )
			{
				try
				{
					System.Windows.Forms.DataObject dataObject = new System.Windows.Forms.DataObject();
					dataObject.SetData(System.Windows.Forms.DataFormats.UnicodeText  , true, strText );
					System.Windows.Forms.Clipboard.SetDataObject(dataObject, true);
					return true;
				}
				catch
				{
					
				}
			}
			return false;
		}

		/// <summary>
		/// 从操作系统剪切板获得文本
		/// </summary>
		/// <returns>获得的文本,若操作失败则返回空对象</returns>
		public static  string GetTextFromClipboard()
		{
			try
			{
				System.Windows.Forms.IDataObject data = System.Windows.Forms.Clipboard.GetDataObject();
				if( data.GetDataPresent(System.Windows.Forms.DataFormats.UnicodeText))
				{
					string strText = ( string) data.GetData( System.Windows.Forms.DataFormats.UnicodeText);
					return strText;
				}
			}
			catch
			{}
			return null;
		}
	}