Question

c#如何按行来读取文本文件，并显示文本的行数

Answer 1

private void Form1_Load(object sender, EventArgs e)
{
int j=0;
label1.Text= FileRowText(@"c:\update.dat",2, ref j);
}

#region 获取文本某行数据
///
/// 获取文本文件某行数据
///
/// 文本文件路径
/// 第几行
/// 返回总行数
///
private string FileRowText(string filePath,int i, ref int j)
{

StreamReader sr = File.OpenText(filePath);
string str = "";
string text = "";
int num = 0;
while ((str = sr.ReadLine()) != null)
{
num++;
if (num == i)
{
text = str;
}
}
j = num;
sr.Close();
return text;
}
#endregion