如何使用datalist將我的硬盤上的文件夾綁定到我的網頁上？

Question

我想告訴我的驅動器的所有jpg文件在我的網頁

protected void Page_Load(object sender, EventArgs e) 
{ 
    if (!IsPostBack) 
    { 
     DirectoryInfo dir = new DirectoryInfo(MapPath("D:\pstRZ")); 
     FileInfo[] files = dir.GetFiles(); 
     ArrayList listItems = new ArrayList(); 

     foreach (FileInfo info in files) 
     { 
      listItems.Add(info); 
     } 

     dtlist.DataSource = listItems; 
     dtlist.DataBind(); 
    } 
} 

Answer 1

如果您需要將影像存儲Web應用程序文件夾外，你需要有什麼辦法可以提供圖像用戶的一個解決方案是使用httphandler。

這裏是你的佈局：

<asp:DataList runat="server" ID="dtlist"> 
    <ItemTemplate> 
     <img src="GetImage.ashx?fileName=<%#Eval("Name")%>" alt="Image"/> 
    </ItemTemplate> 
</asp:DataList> 

這是你的代碼：

if (!IsPostBack) 
{ 
    var dir = new DirectoryInfo("D:\\Images\\"); 
    var files = dir.GetFiles("*.png"); 
    var listItems = new ArrayList(); 

    foreach (FileInfo info in files) 
    { 
     listItems.Add(info); 
    } 

    dtlist.DataSource = listItems; 
    dtlist.DataBind(); 
}    

這裏是HTTP處理程序GetImage.ashx：

public void ProcessRequest(HttpContext context) 
    { 
     var root = "D:\\Images"; 

     var fileName = context.Request.Params["fileName"]; 
     if (String.IsNullOrEmpty(fileName)) RenderInvalidRequestMessage(context); 

     var fullFilePath = root + "\\" + fileName; 
     //var dir = (new FileInfo(fullFilePath)).Directory; 
     //if (dir == null || dir.FullName != root) RenderInvalidRequestMessage(context); 

     if (!File.Exists(fullFilePath)) RenderInvalidRequestMessage(context); 

     //TODO: Add validation and any security check. 

     context.Response.ContentType = "image/png";    
     context.Response.WriteFile(fullFilePath); 
    } 

    private void RenderInvalidRequestMessage(HttpContext context) 
    { 
     context.Response.ContentType = "text/plain"; 
     context.Response.Write("File not found."); 
     context.Response.End(); 
    }