替换文本文件中的某一行（要求此文件存在）代码,CSharp代码库,德仔网

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【CSharp】替换文本文件中的某一行（要求此文件存在）

作者:keenweiwei / 发布于2015/3/24/ 996


	/// <summary>
	 /// LineIndex 表示新的内容所在的行位置
	 /// </summary>
	 /// <param name="sFileName"></param>
	 /// <param name="sOrigionContent"></param>
	 /// <param name="sNewLineContent"></param>
	 /// <param name="LineIndex"></param>
	 public static void SaveTxtReplaceOneLine(string sFileName, string sOrigionContent, string sNewLineContent, int iNewLineIndex)
	 {
	 try
	 {
	 StringBuilder sbNewSave = new StringBuilder();
	 sFileName = sFileName.Replace("|", "_");
	 string sFolder = Directory.GetParent(sFileName).ToString();
	 if (!System.IO.Directory.Exists(sFolder))
	 {
	 System.IO.Directory.CreateDirectory(sFolder);
	 }

	 if (!System.IO.File.Exists(sFileName))
	 {
	 throw new Exception("file not exist");
	 }

	 string[] arrLine = sOrigionContent.Trim().Split(Convert.ToChar(Keys.Return));
	 for (int i = 0; i < iNewLineIndex; i++)
	 {
	 sbNewSave.AppendLine(arrLine[i].Trim('\r').Trim('\n'));
	 }
	 sbNewSave.AppendLine(sNewLineContent);
	 for (int i = iNewLineIndex + 1; i < arrLine.Length; i++)
	 {
	 sbNewSave.AppendLine(arrLine[i].Trim('\r').Trim('\n'));
	 }

	 FileStream fsTxtWrite = new FileStream(sFileName, FileMode.Create, FileAccess.Write);
	 StreamWriter srWrite = new StreamWriter(fsTxtWrite, System.Text.Encoding.UTF8);
	 //StreamWriter srWrite = new StreamWriter(fsTxtWrite, System.Text.Encoding.Default);

	 srWrite.Write(sbNewSave.ToString().Trim());

	 srWrite.Close();
	 srWrite.Dispose();
	 fsTxtWrite.Dispose();

	 }
	 catch (Exception ex)
	 {
	 //MessageBox.Show(ex.Message);

	 #region ### error info
	 try
	 {
	 string sFolder = Directory.GetParent(sFileName).ToString();
	 string sErrFullName = sFolder + "_err_" + System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".txt";
	 if (!System.IO.File.Exists(sErrFullName))
	 {
	 FileStream fs;
	 fs = File.Create(sErrFullName);

	 StreamWriter srWrite = new StreamWriter(fs, System.Text.Encoding.UTF8);

	 srWrite.Write(sFileName);

	 srWrite.Close();
	 srWrite.Dispose();

	 fs.Close();
	 }
	 }
	 catch (Exception ex2)
	 { }
	 #endregion ###error

	 }
	 }

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