如何解决(已解决)IO异常进程无法访问该文件,因为它正在被另一个进程使用
我试图用我的程序从 txt 文件中删除一行,但程序打开了文本文件,所以我不能。我该怎么办?
private void btnDeleteTransaction_Click(object sender,EventArgs e)
{
string line = null;
string delete = txtDeleteTransId.Text;
using (reader = new StreamReader(txtFilePath.Text))
{
try {
using (writer = new StreamWriter(txtFilePath.Text,true))
{
while ((line = reader.ReadLine()) != null)
{
if (String.Compare(line + "|",delete) == 0)
continue;
writer.WriteLine(line);
}
}
}
catch (Exception ex)
{
txtMessages.Text = "exception deleting transaction: " + ex.Message;
}
}
}
在下面想出来。
解决方法
我很笨,试图从读者那里写东西,而你却做不到。如果有人和我一样新,这是我的工作代码。
private void btnDeleteTransaction_Click(object sender,EventArgs e)
{
List<string> records = new List<string>();
found = false;
using (reader = new StreamReader(txtFilePath.Text))
{
while (!reader.EndOfStream)
{
record = reader.ReadLine();
if (record.StartsWith(txtDeleteTransId.Text + "|"))
{
found = true;
}
else
{
records.Add(record);
}
}
if (!found)
{
txtMessages.Text = "Record ID was not found";
return;
}
}
try
{
using (writer = new StreamWriter(txtFilePath.Text,false))
{
foreach (var item in records)
{
writer.WriteLine(item);
}
}
txtMessages.Text = "Record deleted";
}
catch (Exception ex)
{
txtMessages.Text = "exception deleting record: " + ex.Message;
}
}
```
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