具体代码如下所示:
/// <summary>
/// 将Base64字符串转换为Image对象
/// </summary>
/// <param name="base64Str">base64字符串</param>
/// <returns></returns>
public static Bitmap Base64StrToImage(string base64Str)
{
Bitmap bitmap = null;
try
{
byte[] arr = Convert.FromBase64String(base64Str);
MemoryStream ms = new MemoryStream(arr);
Bitmap bmp = new Bitmap(ms);
ms.Close();
bitmap = bmp;
}
catch (Exception ex)
{
}
return bitmap;
}
/// <summary>
/// 将Base64字符串转换为图片并保存到本地
/// </summary>
/// <param name="base64Str">base64字符串</param>
/// <param name="savePath">图片保存地址,如:/Content/Images/10000.png</param>
/// <returns></returns>
public static bool Base64StrToImage(string base64Str, string savePath)
{
var ret = true;
try
{
var bitmap = Base64StrToImage(base64Str);
if (bitmap != null)
{
//创建文件夹
var folderPath = savePath.Substring(0, savePath.LastIndexOf('/'));
FileHelper.CreateDir(folderPath);
//图片后缀格式
var suffix = savePath.Substring(savePath.LastIndexOf('.') + 1, savePath.Length - savePath.LastIndexOf('.') - 1).ToLower();
var suffixName = suffix == "png" ? ImageFormat.Png :
suffix == "jpg" || suffix == "jpeg" ? ImageFormat.Jpeg :
suffix == "bmp" ? ImageFormat.Bmp :
suffix == "gif" ? ImageFormat.Gif : ImageFormat.Jpeg;
//这里复制一份对图像进行保存,否则会出现“GDI+ 中发生一般性错误”的错误提示
var bmpNew = new Bitmap(bitmap);
bmpNew.Save(FileHelper.GetPath(savePath), suffixName);
bmpNew.Dispose();
bitmap.Dispose();
}
else
{
ret = false;
}
}
catch (Exception ex)
{
ret = false;
}
return ret;
}