项目中用到了此功能。把大概做法跟大家共享下，希望对大家有所帮助。也给自己总结一下，激励自己再接再厉。下面中部分代码被汉字替换了，主要考虑到公司的产品权，希望谅解。
/// <summary>
/// 点击打开按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnOpen_Click(object sender, EventArgs e)
{
try
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "Excel文件(*.xls)|*.xls";
//标题
ofd.Title = "打开";
//多选
ofd.Multiselect = false;
//默认值
ofd.FilterIndex = 1;
ofd.InitialDirectory = System.AppDomain.CurrentDomain.BaseDirectory;
&
