关于json动态拼接响应数据

{
"total": "11",
"rows": [
{
"id": "50528",
"firstname": "wrerw",
"lastname": "erwerw",
"phone": "",
"email": ""
},
{
"id": "50529",
"firstname": "asdf",
"lastname": "asdf",
"phone": "",
"email": "asdf@asdf.c"
},
{
"id": "50532",
"firstname": "sdfdsfds",
"lastname": "fsdfdsfagcdga",
"phone": "",
"email": ""
},
{
"id": "50533",
"firstname": "ewfg",
"lastname": "gdfgdfgdfg",
"phone": "",
"email": ""
},
{
"id": "50534",
"firstname": "sagfg",
"lastname": "wwGSGSG",
"phone": "",
"email": ""
},
{
"id": "50535",
"firstname": "sa",
"lastname": "sa",
"phone": "sa",
"email": "sa@dssddsd.dsd"
},
{
"id": "50536",
"firstname": "asdf",
"lastname": "asdf",
"phone": "asdf",
"email": "asdf@asdf.com"
},
{
"id": "50537",
"firstname": "s",
"lastname": "sdf",
"phone": "",
"email": ""
},
{
"id": "50538",
"firstname": "33",
"lastname": "sd",
"phone": "13445",
"email": "131@131.com"
},
{
"id": "50539",
"firstname": "1",
"lastname": "1",
"phone": "1",
"email": "1@qq.com"
}
]
}

DataTable dt = new DataTable();
StringBuilder str = new StringBuilder();
str.Append("{\"total\":\"" + dt.Rows.Count + "\",\"rows\":[");
for (int i = 0; i < dt.Rows.Count; i++)
{
//就是这些\ 转义很容易造成错误
str.Append("{\"FtyVendorCode\":\"" + dt.Rows[i]["CustID"].ToString() + "\",\"CompanyName\":\"" + dt.Rows[i]["CompanyName"].ToString() + "\",\"Contact\":\"" + dt.Rows[i]["ContactPerson"].ToString() + "\",\"EMail\":\"" + dt.Rows[i]["ContactEmail"].ToString() + "\",\"Phone\":\"" + dt.Rows[i]["ContactPhone"].ToString() + "\""); } str.ToString().TrimEnd(new char[] { ',' });
str.Append("]}"); context.Response.Write(str.ToString());