ajax从asp后台获取数据

 

1.前台

　　

$.ajax({

            //url: "demo/data/taskTree.txt",

            url: "GanttChart.aspx?taskList=1" ,

            cache: false,

            success: function (text) {

                var data = mini.decode(text);



                gantt.loadTasks(data);



                gantt.unmask();



                //折叠全部

                //gantt.collapseAll();

            }

        });

 

2.后台

 

if (Request.QueryString["taskList" ] != null)

            {

                GetTaskList();

            }

　　

 StringBuilder taskStr = new StringBuilder ( "[");

            using (SqlConnection conn = new SqlConnection(connString))

            {

                conn.Open();

                string strSQL = @"select * from Tasks order by OrderNumber" ;

                //SqlCommand cmd = new SqlCommand(strSQL, conn);

                //SqlDataReader rdr = cmd.ExecuteReader();

                SqlDataAdapter myda = new SqlDataAdapter(strSQL, conn);

                DataSet myds = new DataSet();

                myda.Fill(myds);

                DataTable tb = myds.Tables[0];

                for (int i = 0; i < tb.Rows.Count; i++)

                {

                    DataRow row = tb.Rows[i];

                    int UID = int .Parse(row[ "OrderNumber"].ToString());

                    string taksName = row["Title" ].ToString();

                    DateTime StartDate = DateTime .Parse(row[ "StartDate"].ToString());

                    DateTime DueDate = DateTime .Parse(row[ "DueDate"].ToString());

                    TimeSpan ts = DueDate.Subtract(StartDate);

                    int FatherTask = int .Parse(row[ "FatherTask"].ToString());

                    int datelenth = ts.Days;

                    taskStr.Append( "{" );

                    taskStr.Append( "'UID': '" + UID + "'," );

                    taskStr.Append( "'Name': '" + taksName + "'," );

                    taskStr.Append( "'Duration': " + datelenth + "," );

                    taskStr.Append( "'Start': '" + StartDate.ToString() + ":T00:00:00" + "',");

                    taskStr.Append( "'Finish': '" + DueDate.ToString() + ":T00:00:00" + "',");



                    taskStr.Append( "'PercentComplete': " + 0 + "," );

                    if (FatherTask == -1)

                        taskStr.Append( "'Summary': " + 1 + "," );

                    else

                        taskStr.Append( "'Summary': " + 0 + "," );

                    taskStr.Append( "'Critical': " + 1 + "," );

                    taskStr.Append( "'Milestone': " + 0 + "," );

                    taskStr.Append( "'PredecessorLink': 0," );

                    taskStr.Append( "'ParentTaskUID': " + FatherTask + "," );

                    taskStr.Append( "}" );

                    if (i != tb.Rows.Count - 1)

                        taskStr.Append( "," );

                }

                taskStr.Append( "]" );

            }

            Response.Write(taskStr.ToString());

            Response.End();