如何在ASP中的FileUpload接受工具中传递变量

Question

如何在文件上载接受工具中传递变量？

FrmFileUpload.aspx.cs

String Ext=".pdf";

FrmFileUpload.aspx

<asp:FileUpload ID="fileUpload1" runat="server"  accept='<%=Ext%>' class="filestyle" data-icon="false" data-classbutton="btn btn-default" Width="500px" data-classinput="form-control inline input-s" AllowMultiple="true"/>

FrmFileUpload.aspx.cs

String Ext=".pdf";

FrmFileUpload.aspx


<asp:FileUpload ID="fileUpload1" runat="server"  accept="Ext" class="filestyle" data-icon="false" data-classbutton="btn btn-default" Width="500px" data-classinput="form-control inline input-s" AllowMultiple="true"/>

接受文件上传工具中的传递变量。