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后台代码把换行符\r\n替换为\\r\\n，前台代码js收到的字符就62616964757a686964616fe78988e69d8331333365633838是\r\n

具体代码如下：

public static string ConvertFromListTojson(IList list, int total, string

columnInfos) where T : class

{

string[] cols = columnInfos.Split(new char[

{','},StringSplitOptions.RemoveEmptyEntries);

StringBuilder sb = new StringBuilder(300);

sb.Append("{\"total\":");

sb.Append(total);

sb.Append(",\"rows\":");

sb.Append("[");

foreach (T t in list)

{

sb.Append("{");

foreach (string col in cols)

{

string name = "\"{0}\":\"{1}\",";

string value = getValue(t, col);

value = value.Replace("\r\n", "\\r\\n");

sb.Append(string.Format(name, col, value));

}

if (cols.Length > 0)

{

int length = sb.Length;

sb.Remove(length - 1, 1);

}

sb.Append("},");

}

if (list.Count > 0)

{

int length2 = sb.Length;

sb.Remove(length2 - 1, 1);

}

sb.Append("]");

sb.Append("}");

return sb.ToString();

}

private static string getValue(T t, string pname) where T : class

{

Type type = t.GetType();

PropertyInfo pinfo = type.GetProperty(pname);

if (pinfo != null)

{

object v = pinfo.GetValue(t, null);

return v != null ? v.ToString() : "";

}

else

{

throw new Exception("不存在属性" + pname);

}

}