Asp.Net更新圖片網址

Question

我有一個圖像控件和按鈕control.I要選擇新的圖像和按鈕點擊更新圖像。 cs文件如下：

protected void Button2_Click(object sender, EventArgs e) 
     { 
//choose new image 
     } 

Answer 1

試試這個。

protected void Button2_Click(object sender, EventArgs e) 
{ 
    image1.ImageUrl = "~/FolderName/yourimage.jpg"; 
} 

Answer 2

你可以嘗試這樣的事情在你的.ASPX：

<form id="form1" runat="server"> 
    <asp:Image ID="Image1" runat="server" /><br /><br /> 
    <asp:FileUpload id="FileUploadControl" runat="server" /> 
    <asp:Button runat="server" id="UploadButton" text="Upload" onclick="UploadButton_Click" /> 
    <br /><br /> 
    <asp:Label runat="server" id="StatusLabel" text="Upload status: " /> 
</form> 

而在你.CS：

protected void UploadButton_Click(object sender, EventArgs e) 
{ 
    if(FileUploadControl.HasFile) 
    { 
     try 
     { 
      string filename = Path.GetFileName(FileUploadControl.FileName); 
      FileUploadControl.SaveAs(Server.MapPath("~/YourImageFolder") + filename); 
      StatusLabel.Text = "Upload status: File uploaded!"; 
      Image1.ImageUrl = "~/YourImageFolder" + filename; 
     } 
     catch(Exception ex) 
     { 
      StatusLabel.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message; 
     } 
    } 
}