◆C#实现批量下载◆
邮件表EmailDB中，邮件的附件以二进制流的形式保存在Files（image 类型）字段中，在页面中要实现勾选邮件的标题批量下载邮件的附件到指定文件夹，如何实现？？！！
我用以下方法实现批量下载，只能下载第一个附件：
protected void btDownLoad_Click(object sender, EventArgs e)
{
string _ID = "";
foreach (GridViewRow gv in GridView1.Rows)
{
CheckBox cb = (CheckBox)gv.FindControl("CheckBox1");
if (cb.Checked)
{
int index = gv.RowIndex;
DataKey key = this.GridView1.DataKeys[index];//获取主键
Int64 GVID = Convert.ToInt64(key.Values["ID"]);
_ID += GVID.ToString() + ",";
}
}
if (_ID == "")
{
ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "click", "alert('请选择要下载的报告！')", true);
}
else
{
int count = _ID.Split(',').Length - 1;
string[] AID = new string[count];
AID = _ID.Split(',');
for (int i = 0; i < count; i++)
{
ProductDocuments doc = new ProductDocuments();
Int64 ID = Convert.ToInt64(AID[i].Trim());
doc = _org.GetDcoumentInfo(ID);
if (string.IsNullOrEmpty(doc.FileType))
if (doc.FileType.ToString() == "")
{
Response.Write("<script>alert('没有附件！')</script>");
}
else
{
string filename = doc.ID + "." + doc.FileType;
filename = HandleFileName(filename);
Response.Clear();
Response.ClearHeaders();
Response.Buffer = false;
Response.AddHeader("Content-Disposition",
String.Format("attachment;filename={0}", filename));
Byte[] buffer = (byte[])doc.Article;
Response.OutputStream.Write(buffer, 0, buffer.Length);
Response.Flush();
Response.End();
}
}
}
}
