[WebMethod]
public void GetQrCodeList(String qrCode) {
Context.Response.Charset = "GB2312"; //设置字符集类型
Context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
Context.Response.Write("返回值字符串");
Context.Response.End();
}
将返回值字符串改为此格式。