i'm trying to bind data from database using javascript ajax function but it didn't work

this page is the result of redirection from another page and have the company id in the url

<script type="text/javascript">
    var url = window.location.search.substring(1);
    var CID = url.split("=")[1];//here i take the company id from the link          
    $.ajax({
        type: "POST",
        url: "CompanyPage.aspx/ajaxBindData", 
        contentType: "application/json;charset=utf-8",
        data: '{CID: ' + JSON.stringify(CID) + '}',
        dataType: "json",
         success: function (data) {
             alert(data.d);
             $("#GridView1").data = append(data.d);
             alert("done appending");
             $("#GridView1").bind;
             alert("done binding");
        },
        error: function (exception) {
            alert(exception.responseText );
        }
    });
    </script>

server side code : //the server side have an class in app_code folder to execute every function in it

    public static string ajaxBindData(int CID)
    {
        /*
        SqlDataReader rd = EditingEmployee.FillEmps(CompanyID);
        GridView1.DataSource = rd;
        GridView1.DataBind();
        rd.Close();
        */
        DataTable dt = EditingEmployee.GetEmps(CID);

        List<Dictionary<string, object>> rows = new List<Dictionary<string, object>>();
        Dictionary<string, object> row = null;

        foreach (DataRow dr in dt.Rows)
        {
            row = new Dictionary<string, object>();
            foreach (DataColumn col in dt.Columns)
            {
                row.Add(col.ColumnName, dr[col]);
            }
            rows.Add(row);
        }

        string json = JsonConvert.SerializeObject(rows);
        return json;
    }

editingemployee : //here is the relation between my project and the database

     internal static DataTable GetEmps(int CompId)
     {
         DataTable dt = new DataTable();
         try
         {
             SqlConnection conn = new SqlConnection(connectionString);
             SqlDataAdapter sda = new SqlDataAdapter();
             conn.Open();
             SqlCommand cmd = new SqlCommand("Select Emp_ID,Emp_Name,Company_ID,Emp_Address,Poste_Name, Salary FROM Employee inner join Postes on Postes.PosteID = Employee.Poste_ID Where Company_ID = " + CompId, conn);
             sda.SelectCommand = cmd;
             sda.Fill(dt);
             return dt;

         }
         catch (SqlException ex)
         {
             return null;
         }
     }