C# 文件打开对话框 类型过滤
private void button_browser_Click(object sender, EventArgs e)
{
openFileDialog1.Multiselect = false;
openFileDialog1.Title = "请选择文件";
openFileDialog1.Filter = "XML文件|*.xml|所有文件|*.*";
if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
{
filename = this.openFileDialog1.FileName;
}
}