frmfind.cs

Winform_OnlineTraning.rar 培训机构的案例在线培训

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
 
namespace Example_2
{
	/// <summary>
	/// Summary description for frmFind
	/// </summary>
	public class frmrichText : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button btnLoad;
		private System.Windows.Forms.Button btnExit;
		private System.Windows.Forms.Button btnFind;
		private System.Windows.Forms.TextBox txtFind;
		private System.Windows.Forms.Label lblFind;
		private System.Windows.Forms.RichTextBox rtbText;
		private static int count;
		private string str=""; 
		private string searchstr;
		private int start;
		private int location;
		private System.Windows.Forms.Label lblFileName;
		private System.Windows.Forms.TextBox txtFileName;
		
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public frmrichText()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.rtbText = new System.Windows.Forms.RichTextBox();
			this.btnLoad = new System.Windows.Forms.Button();
			this.btnExit = new System.Windows.Forms.Button();
			this.btnFind = new System.Windows.Forms.Button();
			this.txtFind = new System.Windows.Forms.TextBox();
			this.lblFind = new System.Windows.Forms.Label();
			this.lblFileName = new System.Windows.Forms.Label();
			this.txtFileName = new System.Windows.Forms.TextBox();
			this.SuspendLayout();
			// 
			// rtbText
			// 
			this.rtbText.Location = new System.Drawing.Point(48, 69);
			this.rtbText.Name = "rtbText";
			this.rtbText.Size = new System.Drawing.Size(326, 103);
			this.rtbText.TabIndex = 0;
			this.rtbText.Text = "";
			// 
			// btnLoad
			// 
			this.btnLoad.Location = new System.Drawing.Point(288, 17);
			this.btnLoad.Name = "btnLoad";
			this.btnLoad.Size = new System.Drawing.Size(90, 25);
			this.btnLoad.TabIndex = 1;
			this.btnLoad.Text = "加载文件(&L)";
			this.btnLoad.Click += new System.EventHandler(this.btnLoad_Click);
			// 
			// btnExit
			// 
			this.btnExit.Location = new System.Drawing.Point(288, 224);
			this.btnExit.Name = "btnExit";
			this.btnExit.Size = new System.Drawing.Size(90, 25);
			this.btnExit.TabIndex = 2;
			this.btnExit.Text = "退出(&E)";
			this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
			// 
			// btnFind
			// 
			this.btnFind.Location = new System.Drawing.Point(182, 224);
			this.btnFind.Name = "btnFind";
			this.btnFind.Size = new System.Drawing.Size(90, 25);
			this.btnFind.TabIndex = 3;
			this.btnFind.Text = "查找文本(&F)";
			this.btnFind.Click += new System.EventHandler(this.btnFind_Click);
			// 
			// txtFind
			// 
			this.txtFind.Location = new System.Drawing.Point(211, 190);
			this.txtFind.Name = "txtFind";
			this.txtFind.Size = new System.Drawing.Size(163, 21);
			this.txtFind.TabIndex = 4;
			this.txtFind.Text = "";
			// 
			// lblFind
			// 
			this.lblFind.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblFind.Location = new System.Drawing.Point(96, 190);
			this.lblFind.Name = "lblFind";
			this.lblFind.Size = new System.Drawing.Size(106, 17);
			this.lblFind.TabIndex = 5;
			this.lblFind.Text = "要查找的文本：";
			// 
			// lblFileName
			// 
			this.lblFileName.Location = new System.Drawing.Point(10, 17);
			this.lblFileName.Name = "lblFileName";
			this.lblFileName.Size = new System.Drawing.Size(115, 25);
			this.lblFileName.TabIndex = 6;
			this.lblFileName.Text = "输入文件名：";
			// 
			// txtFileName
			// 
			this.txtFileName.Location = new System.Drawing.Point(144, 17);
			this.txtFileName.Name = "txtFileName";
			this.txtFileName.Size = new System.Drawing.Size(134, 21);
			this.txtFileName.TabIndex = 7;
			this.txtFileName.Text = "";
			// 
			// frmrichText
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(384, 272);
			this.Controls.Add(this.txtFileName);
			this.Controls.Add(this.lblFileName);
			this.Controls.Add(this.lblFind);
			this.Controls.Add(this.txtFind);
			this.Controls.Add(this.btnFind);
			this.Controls.Add(this.btnExit);
			this.Controls.Add(this.btnLoad);
			this.Controls.Add(this.rtbText);
			this.Name = "frmrichText";
			this.Text = "查找";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new frmrichText());
		}

		private void btnLoad_Click(object sender, System.EventArgs e)
		{
			try
			{
				rtbText.LoadFile(txtFileName.Text);
			}
			catch(FileNotFoundException fexcep)
			{
				MessageBox.Show (fexcep.Message);
			}
			
		}

		private void btnExit_Click(object sender, System.EventArgs e)
		{
			Application.Exit();
		}

		private void btnFind_Click(object sender, System.EventArgs e)
		{
			searchstr = txtFind.Text.Trim ();
			
			//if find is being done first time
			if (count == 0)
			{
				str = rtbText.Text.Trim() ;
				start = 0;
			}
			else //if find has been pressed more than once
			{
			    //assign the new location to start searching from
				start = location + searchstr.Length;			
                str = str.Trim(); 

				if (start<= str.Length)
				    str = str.Substring(start);  
				
			}	
			
			count++;
			
			//call the function
			location = find(searchstr,start);
			
			//mark the text that was found
			this.rtbText.SelectionStart = location;
			this.rtbText.SelectionLength = txtFind.Text.Length;  
			this.rtbText.SelectionFont = new Font("Verdana", 12, FontStyle.Bold);
			this.rtbText.SelectionColor = Color.Red;
			
		}

	private int find(string searchstr, int start)
	{
			
        int loc = this.rtbText.Find(searchstr,start,rtbText.Text.Length,RichTextBoxFinds.WholeWord);
		return loc;
	}
	}
}