DataSourceProviderService，在设计时EnvDTE.Project 级别提供对数据源的访问。

定义：

[Guid("ABE5C1F0-C96E-40c4-A22D-4A5CEC899BDC")]
public abstract class DataSourceProviderService
{
    // Methods
    protected DataSourceProviderService();
    public abstract object AddDataSourceInstance(IDesignerHost host, DataSourceDescriptor dataSourceDescriptor);
    public abstract DataSourceGroupCollection GetDataSources();
    public abstract DataSourceGroup InvokeAddNewDataSource(IWin32Window parentWindow, FormStartPosition startPosition);
    public abstract bool InvokeConfigureDataSource(IWin32Window parentWindow, FormStartPosition startPosition, DataSourceDescriptor dataSourceDescriptor);
    public abstract void NotifyDataSourceComponentAdded(object dsc);

    // Properties
    public abstract bool SupportsAddNewDataSource { get; }
    public abstract bool SupportsConfigureDataSource { get; }

}

所属程序集：System.Design.dll

该服务的使用方法：

代码来源：System.Design.dll

来自类：internal class DesignBindingPicker;

 

  
  this.dspSvc = (DataSourceProviderService) this.serviceProvider.GetService(typeof(DataSourceProviderService));

private void addNewCtrl_Click(object sender, LinkLabelLinkClickedEventArgs e)
{
   this.dspSvc = (DataSourceProviderService) this.serviceProvider.GetService(typeof(DataSourceProviderService)); if ((this.dspSvc != null) && this.dspSvc.SupportsAddNewDataSource)
    {
        DataSourceGroup group = this.dspSvc.InvokeAddNewDataSource(this, FormStartPosition.CenterScreen);
        if ((group != null) && (group.DataSources.Count != 0))
        {
            DataSourceDescriptor dataSource = group.DataSources[0];
            this.FillTree(new DesignBinding(dataSource, ""));
            if (this.selectedNode != null)
            {
                int count = this.selectedNode.Nodes.Count;
                if (this.context.Instance is BindingSource)
                {
                    this.treeViewCtrl.SetSelectedItem(this.selectedNode);
                }
                if ((count == 0) || (this.context.Instance is BindingSource))
                {
                    this.treeViewCtrl.SetSelectedItem(this.selectedNode);
                }
                else if (count == 1)
                {
                    this.treeViewCtrl.SetSelectedItem(this.selectedNode.Nodes[0]);
                }
                else
                {
                    this.ShowSelectedNode();
                    this.selectedNode.Expand();
                    this.selectedNode = null;
                    this.UpdateHelpText(null);
                }
            }
        }
    }
}