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Extjs uses gridpanel to demonstrate how to use JSON to transmit data based on Asp.net

Source: Internet
Author: User
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  2. First, write An ASPX page for generating JSON data from the database. It is called getdata. aspx.

    3. Protected void btntojsonstring_click (Object sender, eventargs E)
    {
    Sqlconnection con = new sqlconnection ();
    Con. connectionstring = "Data Source =.; initial catalog = northwind; Integrated Security = true ";
    VaR cmd = new sqlcommand ();
    Cmd. Connection = con;
    Cmd. commandtext = "select * from products ";
    VaR da = new sqldataadapter ();
    Da. selectcommand = cmd;
    VaR DS = new dataset ();
    Da. Fill (DS, "Products ");
    VaR dt = new datatable ();
    Dt = Ds. Tables ["Products"];
    Response. Write (jsonconvert. serializeobject (DT ));

    }

    //////////////////////////////////////// //////////////////////////////////////// //////////////////

    Next, write another aspx and insert the following JSCode:

    <LINK rel = "stylesheet" type = "text/CSS" href = "JS/resources/CSS/ext-all.css"/>
    <SCRIPT type = "text/JavaScript" src = "JS/ext-base.js"> </SCRIPT>
    <SCRIPT type = "text/JavaScript" src = "JS/ext-all.js"> </SCRIPT>
    <HTML xmlns = "http://www.w3.org/1999/xhtml">
    <Head runat = "server">
    <Title> </title>
    <SCRIPT>

    Ext. onready (function (){
    VaR proxy1 = new Ext. Data. httpproxy ({URL: "getdata. aspx "});
    VaR DS = new Ext. Data. Store ({
    URL: "getdata. aspx ",
    Reader: New Ext. Data. jsonreader ({},
    [{
    Name: "productid ",
    Mapping: "productid"
    },
    {
    Name: "productname ",
    Mapping: "productname"
    },
    {
    Name: "chai ",
    Mapping: "chai"
    },
    {
    Name: "supplierid ",
    Mapping: "supplierid"
    },
    {
    Name: "categoryid ",
    Mapping: "categoryid"
    },
    {
    Name: "quantityperunit ",
    Mapping: "quantityperunit"
    },])
    });
    DS. Load ();

    VaR CM = new Ext. Grid. columnmodel ([{
    Header: 'produd d', dataindex: 'productid'
    },
    {
    Header: 'productname ',
    Dataindex: 'productname'
    },
    {
    Header: 'chai ',
    Dataindex: 'chai'
    }
    ]);
    VaR grid = new Ext. Grid. gridpanel ({
    Title: "Products table ",
    Height: 550,
    Width: 800,
    DS: ds,
    Columns: [New Ext. Grid. rownumberer (),{
    Header: 'produd d', dataindex: 'productid'
    },
    {
    Header: 'productname ', dataindex: 'productname'
    },
    {
    Header: 'chai', dataindex: 'chai'
    },
    {
    Header: 'supplierid', dataindex: 'supplierid'
    },
    {
    Header: 'categoryid', dataindex: 'categoryid'
    },
    {
    Header: 'quantityperunit ', dataindex: 'quantityperunit'
    }],
    Autoscroll: True,
    Loadmask :{
    MSG: 'loading data. Please wait ...... '
    }

    });
    grid. render (document. body);
    });







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