每次我单击文件时,我都会获得错误
空的路径名不合法
我需要一个用户上传.txt
或.csv
文件,并在数据网格视图中显示该文件的内容。一切正常,除了在此行上发生的一个错误:
var sr = new StreamReader(openFileDialog1.FileName);
完整代码。
private void selectButton_Click (object sender, EventArgs e)
{
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
try
{
var sr = new StreamReader(openFileDialog1.FileName);
SetText(sr.ReadToEnd());
}
catch (SecurityException ex)
{
MessageBox.Show($"Security error.nnError message{ex.Message}nn" +
$"Details:nn{ex.StackTrace}");
}
}
}
尝试在openfiledialog1上添加过滤器。
openFileDialog1.Filter = "text file(*.txt)|*.txt|csv file(*.csv)|*.csv";
在打开文件之前检查文件名:
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
if (string.IsNullOrEmpty(openFileDialog1.FileName) {
// ..
return;
}
try
{
var fileStream = openFileDialog1.OpenFile();
using (StreamReader reader = new StreamReader(fileStream))
{
SetText(sr.ReadToEnd());
}
}
catch (SecurityException ex)
{
MessageBox.Show($"Security error.nnError message{ex.Message}nn" +
$"Details:nn{ex.StackTrace}");
}
}