c# - 'OpenFileDialog' 第一次不取值

Question

选择 .dll 文件并按 OK 后，浏览对话框将关闭并重新打开。在它再次打开并按 OK 后，它会毫无问题地取值。

这是我的代码

private void btnBrowse_Click(object sender, EventArgs e) {
            OpenFileDialog dllDialog = new OpenFileDialog();
            dllDialog.Filter = "DLL Files|*.dll";
            dllDialog.InitialDirectory = @"C:\";
            dllDialog.Title = "Please select .dll file.";
            if (dllDialog.ShowDialog() == DialogResult.OK) {
                dllDialog.ShowDialog();
                tbRepTempLibrary.Text = dllDialog.FileName;

            } else { 
                MessageBox.Show("error");
            }
        }

Answer 1

您正在调用ShowDialog()两次。你应该删除第二个，

private void btnBrowse_Click(object sender, EventArgs e) 
{
    OpenFileDialog dllDialog = new OpenFileDialog();
    dllDialog.Filter = "DLL Files|*.dll";
    dllDialog.InitialDirectory = @"C:\";
    dllDialog.Title = "Please select .dll file.";
    if (dllDialog.ShowDialog() == DialogResult.OK) 
    {
        tbRepTempLibrary.Text = dllDialog.FileName;

    } else 
    { 
        MessageBox.Show("error");
    }
}