更具textbox中的参数 控制richtextbox中文本复制的的行数。例如text中填写3 从richtextbox复制出3行文本。

Question

更具textbox中的参数 控制richtextbox中文本复制的的行数。例如text中填写3 从richtextbox复制出3行文本。

Answer 1

B/S        public Form1()
        {
            InitializeComponent();
            //初始化
            this.richTextBox1.Text = "起始行\r\n第二行\r\n第三行\r\n第四行\r\n第五行\r\n第六行\r\n第七行";
        }               private void button1_Click(object sender, EventArgs e)
        {           
            //**********************
            //寫在前面
            //Form中添加richTextBox1,richTextBox2,textBox1三個控件
            //剪貼,可以用select(int 選取字符開始位置,int 選取字符的長度)            
            //**********************
            
            //清空
            this.richTextBox2.ResetText();
            if (this.textBox1.Text.Trim() == "")
            {
                MessageBox.Show("請輸入一個整數");
                return;
            }
            //可以寫個判斷方法
            try
            {
                Convert.ToInt32(this.textBox1.Text.Trim());
            }
            catch (Exception)
            {
                MessageBox.Show("請輸入一個整數");
                return;
            }
            int n = Convert.ToInt32(this.textBox1.Text.Trim());
            //設置讀取的開始行,0為第一行
            int startRow = 0;
            //richTextBox1文本總行數
            int totalRow = this.richTextBox1.Lines.Length;                        int[] strLineLen = new int[totalRow];
            if (totalRow > 0)
            {
                for (int i = 0; i < totalRow; i++)
                {
                    strLineLen[i] = this.richTextBox1.Lines[i].Length;
                }
            }            if (startRow > totalRow)
            {
                MessageBox.Show("richTextBox中取不到此行");
                return;
            }            
            if (startRow + n < totalRow)
            {
                //獲取字符長度
                int strTotalLen = 0;                
                for (int i = startRow; i < startRow + n; i++)
                {
                    string s = "";
                    s = this.richTextBox1.Lines[i].ToString();
                    strTotalLen = strTotalLen + s.Length + 1;                    
                }                
                //獲取開始字符位置
                int startStrIndex = 0;
                for (int i = 0; i < startRow; i++)
                {
                    startStrIndex = startStrIndex + strLineLen[i] + 2;//2="\r\n".string.length;                   
                }
                if (startStrIndex > 1)
                {
                    //選中richTextBox1指定行
                    richTextBox1.Select(startStrIndex - 1, strTotalLen);//因為是從0開始算,要減一
                    //剪貼至richTextBox2中
                    richTextBox1.Cut();
                    if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) == true)
                    {                        
                        richTextBox2.Paste();
                    }
                }
                else
                {
                    //起始行為0的情況
                    //選中richTextBox1指定行
                    richTextBox1.Select(startStrIndex, strTotalLen);//起始行為0
                    //剪貼至richTextBox2中
                    richTextBox1.Cut();
                    if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) == true)
                    {                        
                        richTextBox2.Paste();
                    }
                }
            }
            else
            {
                //獲取字符長度
                int strTotalLen = 0;
                for (int i = startRow; i < totalRow; i++)
                {
                    string s = "";
                    s = this.richTextBox1.Lines[i].ToString();
                    if (i == totalRow - 1)
                    {
                        strTotalLen = strTotalLen + s.Length;//最後一行不需要加了
                    }
                    else
                    {
                        strTotalLen = strTotalLen + s.Length + 1;
                    }                  
                }                
                //獲取開始字符位置
                int startStrIndex = 0;
                for (int i = 0; i < startRow; i++)
                {
                    startStrIndex = startStrIndex + strLineLen[i] + 2;//2="\r\n".string.length;
                } 
                if (startStrIndex > 1)
                {
                    //選中richTextBox1指定行
                    richTextBox1.Select(startStrIndex - 1, strTotalLen);//因為是從0開始算,要減一
                    //剪貼至richTextBox2中
                    richTextBox1.Cut();
                    if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) == true)
                    {                        
                        richTextBox2.Paste();
                    } 
                }
                else
                {
                    //起始行為0的情況
                    //選中richTextBox1指定行
                    richTextBox1.Select(startStrIndex, strTotalLen);//起始行為0
                    //剪貼至richTextBox2中
                    richTextBox1.Cut();
                    if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) == true)
                    {                        
                        richTextBox2.Paste();
                    }
                }
            }
        } 

Answer 2

怎么在用textbox2控制 在剪切的每行后面加上“；”呢？形成在richtextbox2中是字符串的形式。
像。1；2；3；4；