DataBind Charts to SAP Business Warehouse Data

DataBinding facilitates two-way interaction with data through UI controls. Using the CData ADO.NET Provider for SAP Business Warehouse streamlines the process of binding SAP Business Warehouse data to Windows Forms and Web controls within Visual Studio. In this article, we will demonstrate using wizards to establish a binding between SAP Business Warehouse data and a chart that dynamically updates. Additionally, the code walk-through section will guide you through the creation of a chart using just 10 lines of code.

Binding Data to a Chart

DataBinding to a Chart consists of three steps: Instantiate the control, configure the data source, and databind.

Configure the Connection and Select Database Objects

To create a chart control and establish a connection to SAP Business Warehouse, follow the steps outlined below using the Data Source Configuration Wizard. Within the wizard, you'll have the option to choose the specific SAP Business Warehouse entities you wish to bind to.

1. In a Windows Forms project, drag and drop a Chart control from the toolbox to the form. In the Data section of the Chart properties, select DataSource and then select Add Project Data Source from the menu.
2. In the Data Source Configuration Wizard that appears, select Database -> Dataset.
3. In the Choose Your Data Connection step, click New Connection.

4. In the Add Connection dialog, click Change to select the CData SAP Business Warehouse Data Source.

   Below is a typical connection string:

   URL=https://mysapserver:8000;AuthScheme=Basic;User=username;Password=password;

   To connect to SAP Business Warehouse, set the URL property to a valid SAP Business Warehouse server base URL. The driver must connect to SAP Business Warehouse instances hosted over HTTP with XMLA access.

   The driver supports the following authentication schemes via the AuthScheme property:

   • None: Anonymous authentication, if available on the server.
   • Basic: Set User and Password and set AuthScheme to Basic.
   • Kerberos: See the Using Kerberos section of the help documentation for the required Kerberos properties.

   By default, the driver attempts to negotiate SSL/TLS by checking the server's certificate against the system's trusted certificate store. To specify another certificate, see the SSLServerCert property for the available formats.

   When you configure the connection, you may also want to set the Max Rows connection property. This will limit the number of rows returned, which is especially helpful for improving performance when designing reports and visualizations.

   
5. Choose the database objects you want to work with. This example uses the Sales table.

DataBind

After adding the data source and selecting database objects, you can bind the objects to the chart. This example assigns the x-axis to CustomerCount and the y-axis to City.

1. In the Chart properties, click the button in the Series property to open the Series Collection Editor.
2. In the Series properties, select the columns you want for the x- and y-axes: Select columns from the menu in the XValueMember and YValueMember properties.

The chart is now databound to the SAP Business Warehouse data. Run the chart to display the current data.

Code Walk-through

DataBinding to SAP Business Warehouse data requires only a few lines of code and can be completed in three easy steps.

1. Connect to SAP Business Warehouse.
2. Create the SAPBusinessWarehouseDataAdapter to execute the query and create a DataSet to be filled with its results.
3. DataBind the result set to the chart.

Below is the complete code:

SAPBusinessWarehouseConnection conn = new SAPBusinessWarehouseConnection("URL=https://mysapserver:8000;AuthScheme=Basic;User=username;Password=password;");
SAPBusinessWarehouseCommand comm = new SAPBusinessWarehouseCommand("SELECT CustomerCount, City FROM Sales WHERE Country = 'US'", conn);
SAPBusinessWarehouseDataAdapter da = new SAPBusinessWarehouseDataAdapter(comm);
DataSet dataset = new DataSet();
da.Fill(dataset);

chart1.DataSource = dataset;  
chart1.Series[0].XValueMember = "CustomerCount";
chart1.Series[0].YValueMembers = "City";
// Insert code for additional chart formatting here.
chart1.DataBind();