jquery ajax 获取数据 转换成 Json

页面代码:

<head runat="server">
<title>title>
<script src="jquery-1.4.2.min.js" type="text/javascript">script>
<script>
function Datas() {
// var cardName = $("#zhanghu_name").val();
// var cardCreatedOn = $("#startDt").val();
$.ajax({

type:
"post", //提交方式
cache: false,
url:
"Handler1.ashx", //提交地址
dataType: "json",
// data: "name=" + cardName + "&date=" + cardCreatedOn, //提交的数据
//data: "name=伊牛娃&date=2009-05-20",//如果只需要传固定值的话,可以直接这样写
success: function (msg) {//根据返回状态,给出相关提示

$(
"#TextBox1").val(msg.tble[0].Quotation_No);
for (var i = 0; i < msg.tble.length; i++) {
alert(msg.tble[i].Quotation_No)
}

}
});
}

script>
head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" OnClientClick="Datas();return false;" runat="server" Text="Button" />
<asp:TextBox ID="TextBox1" runat="server">asp:TextBox>
div>
form>
body>
html>

处理页面:Handler1.ashx

    public class Handler1 : IHttpHandler
{

public void ProcessRequest(HttpContext context)
{
context.Response.ContentType
= "text/plain";
string json = "";
DataTable tblDatas
= new DataTable("Datas");
tblDatas.Columns.Add(
"Quotation_No", Type.GetType("System.String"));
tblDatas.Columns.Add(
"Cust_PN", Type.GetType("System.String"));
tblDatas.Columns.Add(
"Factory_No", Type.GetType("System.String"));
tblDatas.Rows.Add(
new object[] { "Q11053 ", "BB96168-1A04", "4100" });
tblDatas.Rows.Add(
new object[] { "Q110531001", "BB96168-1A04", "4100" });
json
= DataTableConvertJson.DataTableToJson("tble", tblDatas);

context.Response.Write(json);
}

public bool IsReusable
{
get
{
return false;
}
}
}

转换成 json格式:DataTableConvertJson.cs

public class DataTableConvertJson
{

#region dataTable转换成Json格式
///
/// dataTable转换成Json格式
///

///
///
public static string DataTable2Json(DataTable dt)
{
StringBuilder jsonBuilder
= new StringBuilder();
jsonBuilder.Append(
"{\"");
jsonBuilder.Append(dt.TableName);
jsonBuilder.Append(
"\":[");
jsonBuilder.Append(
"[");
for (int i = 0; i < dt.Rows.Count; i++)
{
jsonBuilder.Append(
"{");
for (int j = 0; j < dt.Columns.Count; j++)
{
jsonBuilder.Append(
"\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append(
"\":\"");
jsonBuilder.Append(dt.Rows[i][j].ToString());
jsonBuilder.Append(
"\",");
}
jsonBuilder.Remove(jsonBuilder.Length
- 1, 1);
jsonBuilder.Append(
"},");
}
jsonBuilder.Remove(jsonBuilder.Length
- 1, 1);
jsonBuilder.Append(
"]");
jsonBuilder.Append(
"}");
return jsonBuilder.ToString();
}

#endregion dataTable转换成Json格式
#region DataSet转换成Json格式
///
/// DataSet转换成Json格式
///

/// DataSet
///
public static string Dataset2Json(DataSet ds)
{
StringBuilder json
= new StringBuilder();

foreach (DataTable dt in ds.Tables)
{
json.Append(
"{\"");
json.Append(dt.TableName);
json.Append(
"\":");
json.Append(DataTable2Json(dt));
json.Append(
"}");
}
return json.ToString();
}
#endregion

///
/// Msdn
///

///
///
///
public static string DataTableToJson(string jsonName, DataTable dt)
{
StringBuilder Json
= new StringBuilder();
Json.Append(
"{\"" + jsonName + "\":[");
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
Json.Append(
"{");
for (int j = 0; j < dt.Columns.Count; j++)
{
Json.Append(
"\"" + dt.Columns[j].ColumnName.ToString() + "\":\"" + dt.Rows[i][j].ToString() + "\"");
if (j < dt.Columns.Count - 1)
{
Json.Append(
",");
}
}
Json.Append(
"}");
if (i < dt.Rows.Count - 1)
{
Json.Append(
",");
}
}
}
Json.Append(
"]}");
return Json.ToString();
}
}



转载于:https://www.cnblogs.com/qiuweiguo/archive/2011/08/04/2127382.html

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