我有一个显示名称和网格的网格链接到文件夹中的所有pdf文件。该链接在浏览器中打开文件。
这并不理想,因为浏览器会缓存文件,因此如果移动或更改文档,仍可访问旧的缓存版本。
是否可以让链接在默认安装的pdf查看器中打开文件并避免完全缓存?
这是我的网格代码:
<form runat="server">
Search for a file: <asp:TextBox ID="txtFilter" runat="server"></asp:TextBox>
<asp:Button ID="btnShow"
runat="server" Text="Display" onclick="btnShow_Click" />
</form>
<asp:DataGrid runat="server" id="FileList" Font-Name="Verdana" CellPadding="5"
AutoGenerateColumns="False" AlternatingItemStyle-BackColor="#eeeeee"
HeaderStyle-BackColor="Navy" HeaderStyle-ForeColor="White"
HeaderStyle-Font-Size="15pt" HeaderStyle-Font-Bold="True">
<Columns>
<asp:HyperLinkColumn DataNavigateUrlField="Name" DataTextField="Name"
HeaderText="File Name" target="_blank"/>
<asp:BoundColumn DataField="LastWriteTime" HeaderText="Last Write Time"
ItemStyle-HorizontalAlign="Center" DataFormatString="{0:d}" />
</Columns>
</asp:DataGrid>
CS:
protected void btnShow_Click(object sender, EventArgs e)
{
ShowData();
}
public void ShowData()
{
DirectoryInfo dirInfo = new DirectoryInfo(Server.MapPath(""));
FileInfo[] info = dirInfo.GetFiles("*.pdf"); //Get FileInfo and Save it a FileInfo[] Array
List<Getfiles> _items = new List<Getfiles>(); // Define a List with Two coloums
foreach (FileInfo file in info) //Loop the FileInfo[] Array
_items.Add(new Getfiles { Name = file.Name, LastWriteTime = file.LastWriteTime.ToString("MM/dd/yyyy") }); // Save the Name and LastwriteTime to List
var tlistFiltered1 = _items.Where(item => item.Name.Contains(txtFilter.Text)); // Find the file that Contains Specific word in its File Name
FileList.DataSource = tlistFiltered1; //Assign the DataSource to DataGrid
FileList.DataBind();
}
public class Getfiles
{
public string Name { get; set; }
public string LastWriteTime { get; set; }
}
答案 0 :(得分:0)
更好的提示向用户提示对话框并要求他下载文件,然后它将避免在浏览器中缓存...
尝试如下...
HTML:
Change the DataGrid HyperLinkColumn
如下所示:
<asp:HyperLinkColumn DataNavigateUrlField="Name" DataTextField="Name"
HeaderText="File Name" target="_blank" DataNavigateUrlFormatString="Download.aspx?FileName={0}" />
然后Add a New .aspx page
到您的网站并将其命名为 Download.aspx ...
并在Page load event
的{{1}}上写下以下代码..
C#:
Download.aspx