JsonSchemaNode() Constructor

Initializes a new instance of the JsonSchemaNode class.

Namespace: DevExpress.DataAccess.Json

Assembly: DevExpress.DataAccess.v21.2.dll

Declaration

[Browsable(false)]
public JsonSchemaNode()

Remarks

Use this constructor to create the data source schema‘s root node:

  • The root node does not define a JSON object’s node.
  • The root node has child nodes that define the JSON object’s nodes.

The following code sample demonstrates a root node.

using DevExpress.DataAccess.Json;
using DevExpress.XtraReports.UI;
public static JsonDataSource CreateDataSourceFromWeb() {
    var jsonDataSource = new JsonDataSource();
    // Specify the endpoint.
    jsonDataSource.JsonSource = new UriJsonSource(
        new Uri("https://raw.githubusercontent.com/DevExpress-Examples/DataSources/master/JSON/customers.json"));
var root = new JsonSchemaNode();
root.NodeType = JsonNodeType.Object;

var customers = new JsonSchemaNode() {NodeType=JsonNodeType.Array, Name="Customers", Selected=true };
customers.AddChildren(new[] {
    new JsonSchemaNode(new JsonNode("CustomerID", true,
    JsonNodeType.Property, typeof(string))) 
    { 
    DisplayName = "Customer ID" },
    new JsonSchemaNode() {
        Name =  "CompanyName",
        Selected = true,
        NodeType = JsonNodeType.Property,
        Type = typeof(string)
    },
    new JsonSchemaNode(new JsonNode("ContactTitle", true, JsonNodeType.Property, typeof(string))),
    new JsonSchemaNode(new JsonNode("Address", false, JsonNodeType.Property, typeof(string)))
});

root.AddChildren(customers);
jsonDataSource.Schema = root;
    // The schema is built, you do not have to call the Fill method to populate the Field List.
    // The Designer calls the Fill method automatically when a document is generated for preview.
    // jsonDataSource.Fill();
    return jsonDataSource;
}
See Also