轉換二進制值位圖圖像

Question

我如何轉換以下二進制值位圖圖像ASP.NET C＃

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

沒有類似的問題的答案幫助了我。任何人請幫助！

Answer 1

看起來像一個PNG圖像（它是一個100x100透明像素的圖像）。您可以使用following function這個十六進制字符串轉換成字節數組，並將其保存到一個文件：

class Program 
{ 
    static void Main() 
    { 
     var data = "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"; 
     var buffer = StringToByteArray(data); 
     File.WriteAllBytes("test.png", buffer); 
    } 

    static byte[] StringToByteArray(string hex) 
    { 
     return Enumerable 
      .Range(0, hex.Length) 
      .Where(x => x % 2 == 0) 
      .Select(x => Convert.ToByte(hex.Substring(x, 2), 16)) 
      .ToArray(); 
    } 
} 

如果你想在ASP.NET動態顯示它您可以編寫一個通用的處理程序，這將有助於該圖像：

public class MyImage : IHttpHandler 
{ 
    public void ProcessRequest(HttpContext context) 
    { 
     context.Response.ContentType = "image/png"; 
     var data = "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"; 
     var buffer = StringToByteArray(data); 
     context.Response.OutputStream.Write(buffer, 0, buffer.Length); 
    } 

    private byte[] StringToByteArray(string hex) 
    { 
     return Enumerable 
      .Range(0, hex.Length) 
      .Where(x => x % 2 == 0) 
      .Select(x => Convert.ToByte(hex.Substring(x, 2), 16)) 
      .ToArray(); 
    } 

    public bool IsReusable 
    { 
     get { return false; } 
    } 
} 

而且在某些Web表單要顯示它您可以使用一個圖像控件指向這個處理程序：

<asp:Image ID="img" runat="server" ImageUrl="~/MyImage.ashx" /> 

或一個簡單的靜態<img>標籤，如果你喜歡：

<img src="<%= ResolveUrl("~/MyImage.ashx") %>" alt="" /> 

另一種可能性是使用Data URI scheme（假設你的客戶端瀏覽器都支持它）：

<img src="data:image/png;base64,<%= MyImageData() %>" alt="" /> 

其中MyImageData功能，可以在你的代碼中定義的背後：

public partial class _Default : System.Web.UI.Page 
{ 
    protected string MyImageData() 
    { 
     var data = "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"; 
     var buffer = StringToByteArray(data); 
     return Convert.ToBase64String(buffer); 
    } 

    private byte[] StringToByteArray(string hex) 
    { 
     return Enumerable 
      .Range(0, hex.Length) 
      .Where(x => x % 2 == 0) 
      .Select(x => Convert.ToByte(hex.Substring(x, 2), 16)) 
      .ToArray(); 
    } 
}