How to use Json in JavaScript

Question

4.00/5 (4 votes)

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Hello Friends,
I have converted datatable to Json and accessing it on clientside. I'm stuck of how to use this Json Object.
I want to display the result in table format
Here I paste my code:

[System.Web.Services.WebMethod()]
    public static Dictionary<string,object> getWIPComments()
    {
        DataTable objDT = new DataTable();
        objDT.TableName = "mydt";
        try
        {
            StringBuilder strQuery = new StringBuilder();
            strQuery.Append("select jobno,commenttext from tbl_workinprogress_comments where jobno in ( ");
            strQuery.Append(" select jobno from tbl_planning P ");
            strQuery.Append(" inner join tbl_mechanicalbrief on tbl_mechanicalbrief.mechanicalid= P.mechanicalid ");
            strQuery.Append(" where statusid in (10))");
            SqlConnection objCon = new SqlConnection("server=xxxx;Initial Catalog=xxxx;User ID=sa;Password=xxxx;pooling='true'; Max Pool Size=200;Connect Timeout=2000000;enlist=false;");
            SqlCommand objCmd = new SqlCommand();
            objCmd.CommandText = strQuery.ToString();
            objCmd.CommandType = CommandType.Text;
            objCmd.Connection = objCon;
            objCon.Open();
            SqlDataAdapter objDA = new SqlDataAdapter("", objCon);
            objDA.SelectCommand = objCmd;
            objDA.Fill(objDT);
        }
        catch(Exception e) { }
        return ToJson(objDT);
    }

    private static List<dictionary><string,>> RowsToDictonary(DataTable objDT)
    {
        List<dictionary><string,>> objs = new List<dictionary><string,>>();
        foreach (DataRow dr in objDT.Rows)
        {
            Dictionary<string,> drow = new Dictionary<string,>();
            for (int i = 0; i < objDT.Columns.Count; i++)
            {
                drow.Add(objDT.Columns[i].ColumnName, dr[i]);
            }
            objs.Add(drow);
        }
        return objs;
    }

    private static Dictionary<string,> ToJson(DataTable table)
    {
        Dictionary<string,> d = new Dictionary<string,>();
        d.Add(table.TableName, RowsToDictonary(table));
        return d;
    }</dictionary></dictionary></dictionary>

Any idea's, how to represent this data in table format on client side?

Thanks in advance.

Posted 5-Jun-11 21:46pm

dhage.prashant01

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Comments

dhage.prashant01 6-Jun-11 5:13am

I tried following, but gives an error. Any idea where I'm going wrong?

<script type="text/javascript">
$(document).ready(function() {
$('#imgComment').click(function() {
$('#msg').slideToggle("fast", "");
$.ajax({
type: "Post",
url: "WIPCommentsNotification.aspx/getWIPComments",
data: "{}",
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function(data) {
if (data != 'null') {
//response = eval('(' + data + ')');
//$(outputDT(data.mydt)).appendTo($('#modalbody'));
$('#body').append(outputDT(data.mydt));
}
},
error: function(event, request, settings) {
alert(msg);
}
});
})
$('#closebutton').click(function() {
$('#msg').fadeOut('slow');
})
});

function outputDT(dataTable) {
var headers = [];
var rows = [];

headers.push("<tr>");
for (var name in dataTable[0]) {
headers.push("<td>"+name+"</td>");
}
headers.push("</tr>");

for (var row in dataTable) {
rows.push("<tr>");
for (var value in dataTable[row]) {
rows.push("<td>");
rows.push(dataTable[row][value]);
rows.push("</td>");
}
rows.push("</tr>");
}
var top = "<table border='1'>";
var bottom = "</table>";
return top + headers.join("") + rows.join("") + bottom;
}
</script>

3 solutions

Solution 2

http://stephenwalther.com/blog/archive/2010/11/30/an-introduction-to-jquery-templates.aspx[^]

http://weblogs.asp.net/dwahlin/archive/2009/05/03/using-jquery-with-client-side-data-binding-templates.aspx[^]

http://weblogs.asp.net/scottgu/archive/2010/05/07/jquery-templates-and-data-linking-and-microsoft-contributing-to-jquery.aspx[^]

http://api.jquery.com/jQuery.template/[^]

Posted 5-Jun-11 22:28pm

Monjurul Habib

Comments

dhage.prashant01 6-Jun-11 7:06am

I'm trying to run code
I'm getting error: [object HTMLDivElement]

What is it?

Solution 1

I searched through the articles in CP and thought this might give you an idea.

JSON Data Visualizer (for Google, Yahoo!, Bing, and Twitter) using jQuery, JavaScript, ASP.NET MVC 2.0[^]

Posted 5-Jun-11 22:18pm

walterhevedeich

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dhage.prashant01 · Accepted Answer · 2011-06-07T23:12:00

Here is final Solution:
aspx.cs file code

private static string ToString(DataTable table)
    {
        StringBuilder sb = new StringBuilder();
        StringBuilder sb1 = new StringBuilder();
        JavaScriptSerializer js = new JavaScriptSerializer();
        if (table != null)
        {
            if (table.Rows.Count > 0)
            {
                foreach (DataRow dr in table.Rows)
                {
                    sb.Append("<table><tbody><tr><td>");
                    sb.Append((dr["jobno"]));
                    sb.Append("</td><td>");
                    sb.Append((dr["commenttext"]));
                    sb.Append("</td></tr></tbody></table>");
                }
            }
        }
        //js.Serialize(sb, sb1);
        return sb.ToString();
    }

aspx file code (JQuery with AJAX Code)

$.ajax({
                            type: "Post",
                            url: "WIPCommentsNotification.aspx/getWIPComments",
                            data: "{}",
                            dataType: "json",
                            contentType: "application/json; charset=utf-8",
                            success: function(data) {
                                try {
                                    data = data.hasOwnProperty("d") ? data.d : data;
Bind(data);
}
                                catch (e) {
                                    alert("Error!!");
                                }
                            },
                            error: function(event, request, settings) {
                                alert(msg);
                            }
                        });


 
function Bind(msg) {
            //alert("Hello");
//            var response = JSON.parse(msg);
            //            alert(response);
            try {
                var table = "<table id="tblResult" border="1" style="width:100%;"><thead> <tr><th>JobNo</th>  <th>Comment</th>  </tr></thead>  <tbody>";
                table += msg;
                table += '</tbody></table>';
                $('#details').html(table);
            }
            catch (e){alert("Table Error!!");}
        }

Happy Coding!!