I am saving data to a file-name using Stream writer but if i run the code for second time the same data is appended to the previous data but i would like to clear the old开发者_JAVA技巧 data and write the data
The data i should have in text file should be as follows
101 435435345 3445454541104021031A094101
52251 1 1 CCD1 110402110402 1111000020000001
6281110000251 00000000011 1 1 0111000020000001
822500000100111000020000000000010000000000001 111000020000001
9000001000001000000010011100002000000000001000000000000
My sample code
if (i == 0)
{
index++;
string m_strDate = DateTime.Now.ToString("yyyy/MM/dd");
m_strDate = m_strDate.Replace("/", "");
StrFilePath = "log" + m_strDate + index + ".txt";
}
using (StreamWriter sw = new StreamWriter(StrFilePath,true))
{
using (StreamReader sr = new StreamReader(new MemoryStream(System.Text.Encoding.ASCII.GetBytes(strLine))))
{
while (sr.Peek() >= 0)
{
strReadLine = sr.ReadLine();
if (strReadLine.StartsWith("1"))
{
if (i == 0)
{
strFileHeader = strReadLine;
sw.WriteLine(strFileHeader);
}
}
if (strReadLine.StartsWith("5"))
{
strBatchHeader = strReadLine;
if (i == 0)
{
Btchno = Convert.ToInt32(strBatchHeader.Substring(87, 7));
BatchCnt = Convert.ToInt16(Btchno);
}
if (i > 0)
{
BatchCnt++;
strBatchHeader = strBatchHeader.Substring(0, 87) + Convert.ToString(BatchCnt.ToString().PadLeft(7, (char)48));
}
sw.WriteLine(strBatchHeader);
}
}
}
}
You're passing true
as the append
parameter in the StringWriter
constructor.
Second parameter here: new StreamWriter(StrFilePath,true)
is set to true, which means append to file. Set that parameter to false and it will work.
精彩评论