如何將Base64字符串轉換爲Png圖像Mvc5 C＃？

Question

我試圖將Base64編碼的字符串轉換爲Png圖像，但代碼顯示參數的例外在Image.FromStream()上無效。調試後，我在MemoryStream對象上發現了這個錯誤「ReadTimeout ='ms.ReadTimeout'拋出了'System.InvalidOperationException'類型的異常。我卡住了，是否有任何解決方案或選擇將字符串轉換爲Png在C＃中？

這裏是我的代碼

string code = "string"; 
var databytes = Encoding.Unicode.GetBytes(code); 
var base64 = Convert.ToBase64String(databytes); 
Byte[] Bytes = Convert.FromBase64String(base64); 
//Stream bytes 
MemoryStream ms = new MemoryStream(Bytes, 0, Bytes.Length); 
//convert image 

Image newImage = Image.FromStream(ms); 
newImage.Save("~/Content/");  

Answer 1

試試這個：

byte[] bytes = Convert.FromBase64String(base64); 
Image image; 
using (MemoryStream ms = new MemoryStream(bytes)) 
{ 
    image = Image.FromStream(ms); 
} 

Answer 2

您可以Base64編碼字符串轉換成PNG這樣：

byte[] bytes = Convert.FromBase64String(base64); 

    Image image; 
    using (MemoryStream ms = new MemoryStream(bytes)) 
    { 
     image = Image.FromStream(ms); 
     image.Save("~/Content/", System.Drawing.Imaging.ImageFormat.Png); 
    }