asp.net读取EXcel的小讨论

在CS文件中，首先在顶部引入操作Excel数据的命名空间
using System.Data.OleDb;
正式代码如下：
    private void Button_Click(object sender, System.EventArgs e)
    {
        string thefullname = this.uploadFile.PostedFile.FileName;//获取完整路径
        ClientScriptManager csm = Page.ClientScript;
        if (thefullname == "")
        {
            csm.RegisterStartupScript(GetType, "Error", "alert('请选择要上传得Excel文件');", true);
            return;
        }
        int fileLength = this.uploadFile.PostedFile.ContentLength;
        if (fileLength > 512000)
        {
            csm.RegisterStartupScript(GetType, "Error", "alert('文件已超过500K，无法上传！');", true);
            return;
        }
        FileInfo info = new FileInfo(thefullname);
        string fileExt = info.Extension;
        if (fileExt.ToLower() != ".xls")
        {
            csm.RegisterStartupScript(GetType, "Error", "alert('不是Excel文件，请使用正确的文件格式！');", true);
            return;
        }
        string uploadPath = Page.MapPath(@"uploadfile\report.xls");