I am trying to use Syncfusion graph via codebehind. I found this link and sample program as below link.
https://www.syncfusion.com/forums/130261/create-charts-dynamically-base-on-user-data
http://www.syncfusion.com/downloads/support/forum/130261/ze/Sample-503161674
I was able to run the sample project without issue, the graph shown as expected. However when I tried to copied the same code to my project and run it, I keep getting an error as below. Anybody can shed a light where did I do wrongly?
Server Error in '/' Application. Value cannot be null. Parameter name: key Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentNullException: Value cannot be null. Parameter name: key
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[ArgumentNullException: Value cannot be null. Parameter name: key]
System.Collections.Generic.Dictionary`2.FindEntry(TKey key) +12756140 Syncfusion.JavaScript.EssentialJavaScript.RegisterControl(String id, String jsonData) +26 Syncfusion.JavaScript.Control.RenderJson() +224 Syncfusion.JavaScript.Control.Raw() +98 Syncfusion.JavaScript.Control.ToHtmlString() +8
Syncfusion.JavaScript.Web.Chart.Render(HtmlTextWriter writer) +51
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +129
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +287
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +27
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +197
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +9
System.Web.UI.Control.Render(HtmlTextWriter writer) +10
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +129
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +287
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +27
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +197
System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +177
System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +32
System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +357 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +129
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +287
System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +53
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +197
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +9
System.Web.UI.Page.Render(HtmlTextWriter writer) +30
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +129
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +287
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +27
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5626Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4075.0
As a matter of fact, I tried to use ajaxcontroltoolkit graph, also get the same error. There must be some setting or configuration error from my project. But I couldn't catch it. Thanks for the help.
