C# Base64 字符串转 JPEG 图像
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C# Base64 String to JPEG Image
提问by Subby
I am trying to convert a Base64String to an image which needs to be saved locally.
我正在尝试将 Base64String 转换为需要在本地保存的图像。
At the moment, my code is able to save the image but when I open the saved image, it says "Invalid Image".
目前，我的代码能够保存图像，但是当我打开保存的图像时，它显示“无效图像”。
Code:
代码：
try
{
using (var imageFile = new StreamWriter(filePath))
{
imageFile.Write(resizeImage.Content);
imageFile.Close();
}
}
The Contentis a stringobject which contains the Base64 String.
的Content是一个string其中包含的Base64字符串对象。
采纳答案by Paul Farry
So with the code you have provided.
因此，使用您提供的代码。
var bytes = Convert.FromBase64String(resizeImage.Content);
using (var imageFile = new FileStream(filePath, FileMode.Create))
{
imageFile.Write(bytes ,0, bytes.Length);
imageFile.Flush();
}
回答by Monah
First, convert the base 64 string to an Image, then use the Image.Savemethod.
首先，将 base 64 字符串转换为Image，然后使用该Image.Save方法。
To convert from base 64 string to Image:
要将 base 64 字符串转换为Image：
public Image Base64ToImage(string base64String)
{
// Convert base 64 string to byte[]
byte[] imageBytes = Convert.FromBase64String(base64String);
// Convert byte[] to Image
using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
{
Image image = Image.FromStream(ms, true);
return image;
}
}
To convert from Imageto base 64 string:
转换Image为 base 64 字符串：
public string ImageToBase64(Image image,System.Drawing.Imaging.ImageFormat format)
{
using (MemoryStream ms = new MemoryStream())
{
// Convert Image to byte[]
image.Save(ms, format);
byte[] imageBytes = ms.ToArray();
// Convert byte[] to base 64 string
string base64String = Convert.ToBase64String(imageBytes);
return base64String;
}
}
Finally, you can easily to call Image.Save(filePath);to save the image.
最后，您可以轻松调用Image.Save(filePath);以保存图像。
回答by Hussain Ahmed Shamsi
public Image Base64ToImage(string base64String)
{
// Convert Base64 String to byte[]
byte[] imageBytes = Convert.FromBase64String(base64String);
MemoryStream ms = new MemoryStream(imageBytes, 0, imageBytes.Length);
// Convert byte[] to Image
ms.Write(imageBytes, 0, imageBytes.Length);
Image image = Image.FromStream(ms, true);
return image;
}
回答by Rajesh-Systematix
Front :
正面 ：
<Image Name="camImage"/>
Back:
后退：
public async void Base64ToImage(string base64String)
{
// read stream
var bytes = Convert.FromBase64String(base64String);
var image = bytes.AsBuffer().AsStream().AsRandomAccessStream();
// decode image
var decoder = await BitmapDecoder.CreateAsync(image);
image.Seek(0);
// create bitmap
var output = new WriteableBitmap((int)decoder.PixelHeight, (int)decoder.PixelWidth);
await output.SetSourceAsync(image);
camImage.Source = output;
}
