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+---
+title: Using Dynamic ExpandoObject as DataSource in RadHtmlChart
+description: Learn how to bind a dynamic ExpandoObject list to the DataSource of a RadHtmlChart in ASP.NET AJAX applications.
+type: how-to
+page_title: Binding Dynamic Expando List to RadHtmlChart DataSource in ASP.NET AJAX
+slug: htmlchart-bind-dynamic-expando-list
+tags: radhtmlchart, asp.net ajax, datasource, databind, expandoobject, datatable
+res_type: kb
+ticketid: 1684733
+---
+
+## Environment
+
+
+
+
+
Product
+
RadHtmlChart for ASP.NET AJAX
+
+
+
Version
+
All
+
+
+
+
+## Description
+
+I have created a dynamic "expando" object list and assigned it to the DataSource of a RadHtmlChart. No error occurs, but the HTMLChart remains empty. In CodeLens, I see the DataSource is available on the RadHTMLChart. Is this type of DataSource supported?
+
+
+This knowledge base article also answers the following questions:
+
+- How to bind a RadHtmlChart to a dynamic data source in ASP.NET AJAX?
+- Can I use an ExpandoObject as a DataSource for RadHtmlChart?
+- How to convert an ExpandoObject list to a DataTable for RadHtmlChart binding?
+
+## Solution
+
+The `ExpandoObject` is not directly supported as a data source for the RadHtmlChart due to the dynamic creation of its properties. However, you can convert an `ExpandoObject` list to a `DataTable`, which is a supported data source for the RadHtmlChart. Follow these steps to convert and bind the data:
+
+1. Convert the `ExpandoObject` list to a `DataTable`.
+
+2. Bind the `DataTable` to the RadHtmlChart.
+
+Here's the implementation:
+
+````C#
+protected void Page_Load(object sender, EventArgs e)
+{
+ if (!IsPostBack)
+ {
+ RadHtmlChart1.DataSource = GetDataSource();
+ RadHtmlChart1.DataBind();
+ }
+}
+
+private DataTable GetDataSource()
+{
+ List dataSource = GetExpandoObjectData();
+ DataTable dataTable = ExpandoListToDataTable(dataSource);
+
+ return dataTable;
+}
+
+private DataTable ExpandoListToDataTable(List list)
+{
+ DataTable dataTable = new DataTable();
+
+ if (list == null || list.Count == 0) return dataTable;
+
+ // Use the first item to define the columns
+ IDictionary firstRow = list[0];
+ foreach (string key in firstRow.Keys)
+ {
+ dataTable.Columns.Add(key, firstRow[key].GetType() ?? typeof(object));
+ }
+
+ // Populate the rows
+ foreach (ExpandoObject item in list)
+ {
+ IDictionary dict = item;
+ DataRow row = dataTable.NewRow();
+ foreach (string key in dict.Keys)
+ {
+ row[key] = dict[key] ?? DBNull.Value;
+ }
+ dataTable.Rows.Add(row);
+ }
+
+ return dataTable;
+}
+
+private List GetExpandoObjectData()
+{
+ // Example data creation using ExpandoObject
+ dynamic row1 = new ExpandoObject();
+ row1.X_Axis_Categories = "Label 1";
+ row1.First_Series_Values = 1;
+ row1.Second_Series_Values = 5;
+
+ dynamic row2 = new ExpandoObject();
+ row2.X_Axis_Categories = "Label 2";
+ row2.First_Series_Values = 10;
+ row2.Second_Series_Values = 15;
+
+ return new List { row1, row2 };
+}
+````
+
+3. Ensure your RadHtmlChart markup is set up to use the columns from your DataTable as data fields:
+
+````ASP.NET
+
+
+
+
+
+
+
+
+
+````
+
+## See Also
+
+- [Data Binding Overview for RadHtmlChart](https://www.telerik.com/products/aspnet-ajax/documentation/controls/htmlchart/data-binding/overview#data-binding-overview)
+- [DataTable Class in .NET](https://docs.microsoft.com/en-us/dotnet/api/system.data.datatable?view=netframework-4.8)