Question

如何上传base64的img到服务器

Answer 1

前端JS
var reader = new FileReader();
reader.onload = function (e) {
//图片base64数据
var imgBase64Data = e.target.result;
var pos = imgBase64Data.indexOf("4")+2;
imgBase64Data = imgBase64Data.substring(pos, imgBase64Data.length - pos);//掉Base64:标识字符
$.ajax({
type: "POST",
url: "",
async: false,
xhrFields: { withCredentials: true },
data: { 'base64StrImgData': imgBase64Data, 'imgFormat': fileext},
dataType: "text",
success: function (data) {
alert(data);
domUtils.on(iframe, 'load', callback);
},

error: function (err) {
alert("error");
alert(err.responseText);
}

});
return;

};
reader.readAsDataURL(input.files[0]);

台C#代码:
///
/// 图像转换Base64编码
///
/// 图像
/// 图像格式
/// 现异否抛
/// 转换功返其Base64编码；失败返空串
public static string ImageToBase64(System.Drawing.Image image, ImageFormat format, OPResult opRes, bool throwException = false)
{
return ExceptionHelper.ExceptionRecord(() =>
{
string base64String = "";
try
{
using (MemoryStream ms = new MemoryStream())
{
image.Save(ms, format);
byte[] imageBytes = ms.ToArray();
base64String = Convert.ToBase64String(imageBytes);
}
}
catch (Exception ex)
{
throw new Exception("图片转base64字符串现异:" + ex);
}

return base64String;
}, opRes, throwException);
}