Walkthrough: Calling the Query Service with a Static Query

Artículo
11/07/2012

Important

This content is archived and is not being updated. For the latest documentation, see Microsoft Dynamics 365 product documentation. For the latest release plans, see Dynamics 365 and Microsoft Power Platform release plans.

Applies To: Microsoft Dynamics AX 2012 R2, Microsoft Dynamics AX 2012 Feature Pack, Microsoft Dynamics AX 2012

The Microsoft Dynamics AX query service runs a query that you specify and returns the data in a dataset. When you call the query service, you can specify a static query, that is, a query that is already defined in the Application Object Tree (AOT). In this walkthrough, you will call the query service from a C# program and display customer and customer transaction data in grids on a form.

This walkthrough illustrates the following tasks:

Add a reference to the query service.
Call the query service with a static query name and display the data.

Prerequisites

To complete this walkthrough you will need:

Microsoft Dynamics AX 2012
Visual Studio 2010

The code in this topic runs against the default company of the current user. Therefore, you should ensure that you have data in the CustTable table for that company.

Add a Reference to the Query Service

In order to call the query service, you must first create a project in Visual Studio and add a reference to the service.

To add a reference to the query service

Open Visual Studio and create a new project by selecting File > New> Project.
In the Project types tree, select Visual C# > Windows and then click the Windows Forms Application template.
Type a project name such as QueryServiceStaticTest and then click OK.
In Solution Explorer, right-click References and select Add Service Reference.
In the Address Field, enter the URL of the service. For example, http://<servername>:8101/DynamicsAx/Services/QueryService.
Click Go. In the Services tree, you should see the QueryService.
Type QueryServiceReference in the Namespace field and then click OK.

Call the Service and Retrieve the Data

Now we will write the code that calls the query service and returns the data specified by the CustTable query.

To call the query service

In Solution Explorer, double-click Form1.cs to display the form in design mode.
Open the Toolbox and add three DataGridView controls to Form1. By default, they will be named DataGridView1, DataGridView2, and DataGridView3.
In the Form1.cs file, add the following using statement.
```
using QueryServiceStaticTest.QueryServiceReference;
```

In the Form1_Load event, add the code to call the query service. The Form1.cs file should contain the following code.

using System;
using System.Data;
using System.Windows.Forms;
using QueryServiceStaticTest.QueryServiceReference;

namespace QueryServiceStaticTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.Load += new EventHandler(Form1_Load);

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            QueryServiceClient client = new QueryServiceClient();

            DataSet dataSet;
            Paging paging = null;

            // Create the binding source objects.
            BindingSource custBindingSource = new BindingSource();
            BindingSource custTransBindingSource = new BindingSource();
            BindingSource custTransOpenBindingSource = new BindingSource();

            // Set the grid datasources to binding source objects.
            dataGridView1.DataSource = custBindingSource;
            dataGridView2.DataSource = custTransBindingSource;
            dataGridView3.DataSource = custTransOpenBindingSource;

            // Call the CustTable query using the query service.
            dataSet = client.ExecuteStaticQuery("CustTable", ref paging);

            // Set the binding source data sources and data members.
            // CustTable_CustTrans and CustTrans_CustTransOpen are table relations
            // in the dataset.
            custBindingSource.DataSource = dataSet;
            custBindingSource.DataMember = "CustTable";

            custTransBindingSource.DataSource = custBindingSource;
            custTransBindingSource.DataMember = "CustTable_CustTrans";

            custTransOpenBindingSource.DataSource = custTransBindingSource;
            custTransOpenBindingSource.DataMember = "CustTrans_CustTransOpen";

        }
    }
}

Run the program. This code calls the query service and passes in the name of the CustTable static query. The results of the query are returned in a dataset and displayed in the three grids.

The first grid contains customer records, the second grid contains customer transactions, and the third grid contains open customer transactions. The grids are bound to the dataset and use the existing table relations so if you click a customer, the transactions for that customer appear in the second grid. If you click on a transaction, the open transactions for that customer appear in the third grid. The relations are defined in data sources of the static query in the AOT.

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