Binding data in DevExpress Treelist from database

问题

In my project i have a UserControl named SubControl. In that UserControl which contains TreeList and two Button. the button used to focus the next and previous row of the treelist.

In another project I have another UserControl named MainControl various controls and Here i'm using the SubControl.

What my problem is, From MainControl i can't able to bind the data into the treelist from the database.

SqlConnection SqlCon = new SqlConnection("Data Source=source; Initial Catalog=dbname; Integrated Security=True");
        SqlCon.Open();
        SqlCommand ad = new SqlCommand("Select* from mytablename", SqlCon);
        SqlDataAdapter da = new SqlDataAdapter(ad);
        DataSet ds = new DataSet();

        da.Fill(ds);

        SubControl.DataSource = ds; 
        SubControl.DataBindings();

How can i achieve this. Helps appreciated

回答1:

You have to bind to the DataTable, not the DataSet.

SubControl.DataSource = ds.Tables[0];

From DevExpress:

https://www.devexpress.com/Support/Center/Question/Details/Q520794

In order to create the tree list hierarchical structure, it's necessary to specify two additional fields in the source DataTable. The first field must store the nodes' unique IDs (in most cases, there is already a primary key in the DataTable). The other field must contain the parent node's ID for each node. To specify these fields for the TreeList control, use the TreeList.KeyFieldName and TreeList.ParentFieldName properties. Please refer to the following help article for more information in this regard: Tree Generation Algorithm in the XtraTreeList.

来源：https://stackoverflow.com/questions/44157302/binding-data-in-devexpress-treelist-from-database

标签

sql

winforms

devexpress

treelist