C#寫入TXT文字檔

C#寫入TXT文字檔

//=====================
//描述：寫入TXT檔案
//返回：void
//作者：Kunsa
//建立時間：2010.5.4 8:25
//狀態:已完成
//修改：
//=====================private void TxtWrite(string strToWrite,string filename)
{
    FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write);
    StreamWriter sw = new StreamWriter(fs);
    sw.BaseStream.Seek(0, SeekOrigin.Begin);
    sw.WriteLine(strToWrite);
    sw.Close();
} ---------------------------------------------------------------------------------------------

      using System.IO;

 

 

        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == string.Empty)
            {
                MessageBox.Show("要寫入的檔案內容不可為空");
            }
            else
            {
                //設定儲存檔案的格式
                saveFileDialog1.Filter = "文字檔(*.txt)|*.txt";
                if (saveFileDialog1.ShowDialog() == DialogResult.OK)
                {
                    //使用“另存新檔”對話方塊中輸入的檔案名稱執行個體化StreamWriter對象
                    StreamWriter sw = new StreamWriter(saveFileDialog1.FileName, true);
                    //向建立的檔案中寫入內容
                    sw.WriteLine(textBox1.Text);
                    //關閉當前檔案寫入流
                    sw.Close();
                    textBox1.Text = string.Empty;
                }
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            //設定開啟檔案的格式
            openFileDialog1.Filter = "文字檔(*.txt)|*.txt";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                textBox1.Text = string.Empty;
                //使用“開啟”對話方塊中選擇的檔案執行個體化StreamReader對象
                StreamReader sr = new StreamReader(openFileDialog1.FileName);
                //調用ReadToEnd方法讀取選中檔案的全部內容
                textBox1.Text = sr.ReadToEnd();
                //關閉當前檔案讀取流
                sr.Close();
            }
        }

 

注意：在表單控制項中添加 openFileDialog1 和 saveFileDialog1