asp.net 选择文件保存路径该如何实现？

asp.net 选择文件保存路径该怎么实现？？？？？？

  我下面的备份代码该怎么改进才能实现保存路径的选择呢？？？

C# code

 protected void btnBackUp_Click(object sender, EventArgs e)      {        string ConnctionString = "Data Source=.;User ID=sa;Password=123;Database='" + this.dbName.SelectedValue + "'";        string dbbackupfilepath = Server.MapPath("~/DBBackUpFile/DataBase");        string strSQL = "backup database " + this.dbName.SelectedValue + " to disk='" + dbbackupfilepath + "\\" + this.tbPosition.Text.Trim() + ".bak'";                        try        {            //判断该路径下是否已经有该文件了            if (File.Exists(dbbackupfilepath + "\\" + this.tbPosition.Text.Trim() + ".bak"))            {                //存在此文件，提示错误                   ClientScript.RegisterClientScriptBlock(GetType(), "", "<script>alert('文件名已存在,请重新命名!');</script>");                      return;            }            else            {                using (SqlConnection con = new SqlConnection(ConnctionString))                {                    con.Open();                                                         using (SqlCommand cmd = new SqlCommand(strSQL, con))                        {                            cmd.ExecuteNonQuery();                            ClientScript.RegisterClientScriptBlock(GetType(), "", "<script>alert('数据库备份成功!');</script>");                                                    }                 }                                              }        }        catch (Exception ex)        {            ClientScript.RegisterClientScriptBlock(GetType(), "", "<script>alert('备份数据库失败!原因是:" + ex.Message + "');</script>");        }    }

[解决办法]
手动选择保存路径好像要自己绘制选择对话框，b/s中很少见到这种做法，一般采用将存储路径放在配置文件中，达到不需要修改程序，修改存储路径的效果。
[解决办法]
添加个下拉列表框，选择路劲。把路劲传到后台代码。
[解决办法]

探讨

添加个下拉列表框，选择路劲。把路劲传到后台代码。

[解决办法]
 

有个控件FILEUPLOAD也许对你有帮助，代码你再优化吧。。。
[解决办法]
可能你要关监狱了 呵呵
[解决办法]
看了这段代码你就知道了
protected override void dataProduct_MouseDoubleClick(object sender, MouseEventArgs e)
{
base.dataProduct_MouseDoubleClick(sender, e);
if (dataProduct.CurrentCell.ColumnIndex != -1)
{
int indexNum = dataProduct.CurrentCell.ColumnIndex;
string ColumnText = dataProduct.Columns[indexNum].HeaderText.ToString();
string strsNO = dataProduct.Rows[dataProduct.CurrentRow.Index].Cells["序号"].EditedFormattedValue.ToString().Trim();
string strhtNO = dataProduct.Rows[dataProduct.CurrentRow.Index].Cells["h_code"].EditedFormattedValue.ToString().Trim();
if (ColumnText == "附件")
{
OpenFileDialog OpenFileDialog1 = new OpenFileDialog();
OpenFileDialog1.Filter = "All files (*.*)|*.*|(*.pdf)|*.pdf|(*.xls)|*.xls|(*.doc)|*.doc|(*.jpg)|*.jpg";
OpenFileDialog1.FilterIndex = 0;
OpenFileDialog1.Title = "";
OpenFileDialog1.Multiselect = false;
if (OpenFileDialog1.ShowDialog() == DialogResult.OK)

{
if (OpenFileDialog1.FileName.Length != 0)
{
if (Convert.ToInt32(strsNO) == 1)
{
strfile1 = OpenFileDialog1.FileName;
OpenFileDialog1.AddExtension = true;
strname1 = Path.GetFileName(strfile1);
dataProduct.Rows[dataProduct.CurrentRow.Index].Cells["附件"].Value = strname1;
txtMater.Focus();
}
else
{
strfile2 = OpenFileDialog1.FileName;
OpenFileDialog1.AddExtension = true;
strname2 = Path.GetFileName(strfile2);
dataProduct.Rows[dataProduct.CurrentRow.Index].Cells["附件"].Value = strname2;
txtMater.Focus();
}
}
}
}
}
}
[解决办法]
是web的？？？那就用webservice吧.

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