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DataBind Charts to Oracle Eloqua Data


Use the standard ADO.NET procedures for databinding to provide bidirectional access to Oracle Eloqua data from controls in the Visual Studio toolbox. This article demonstrates a graphical approach using wizards in Visual Studio, as well as how to databind with only a few lines of code.

DataBinding facilitates two-way interaction with data through UI controls. Using the CData ADO.NET Provider for Oracle Eloqua streamlines the process of binding Oracle Eloqua data to Windows Forms and Web controls within Visual Studio. In this article, we will demonstrate using wizards to establish a binding between Oracle Eloqua 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.

DataBind to a Chart

DataBinding 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 Oracle Eloqua, follow the steps outlined below using the Data Source Configuration Wizard. Within the wizard, you'll have the option to choose the specific Oracle Eloqua 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 Oracle Eloqua Data Source.

    Below is a typical connection string:

    User=user;Password=password;Company=CData;

    There are two authentication methods available for connecting to Oracle Eloqua: Login and OAuth. The Login method requires you to have the Company, User, and Password of the user.

    If you do not have access to the username and password or do not wish to require them, you can use OAuth authentication. OAuth is better suited for allowing other users to access their own data. Using login credentials is better suited for accessing your own data.

    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 Campaign 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 Name and the y-axis to ActualCost.

  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 Oracle Eloqua data. Run the chart to display the current data.

Code Walk-through

DataBinding to Oracle Eloqua data requires only a few lines of code and can be completed in three easy steps.

  1. Connect to Oracle Eloqua.
  2. Create the OracleEloquaDataAdapter 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:

OracleEloquaConnection conn = new OracleEloquaConnection("User=user;Password=password;Company=CData;"); OracleEloquaCommand comm = new OracleEloquaCommand("SELECT Name, ActualCost FROM Campaign", conn); OracleEloquaDataAdapter da = new OracleEloquaDataAdapter(comm); DataSet dataset = new DataSet(); da.Fill(dataset); chart1.DataSource = dataset; chart1.Series[0].XValueMember = "Name"; chart1.Series[0].YValueMembers = "ActualCost"; // Insert code for additional chart formatting here. chart1.DataBind();