Error CS1660 cannot convert lambda expression to type 'string' because it is not a delegate type

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@using DevExpress.Web.Mvc.UI;
@using System.Web.Mvc.Html;
@using System.IO;
@using DevExpress.AspNetCore;
@using System.Linq;
@using Microsoft.EntityFrameworkCore;
@using DevExpress.XtraRichEdit;
@using DevExpress.AspNetCore.RichEdit;
@using Microsoft.AspNetCore.Components.Web;
@using System.Net;

@using (Html.BeginForm())
{
   
    @Html.DevExpress().RichEdit(delegate(setting =>
{
     settings.Name = "RichEdit";
     settings.CallbackRouteValues = new { Controller = "Home", Action = "RichEditPartial" };
})).GetHtml()
}

What I have tried:

@using (Html.BeginForm())
{
    @Html.DevExpress().RichEdit(delegate(setting =>
{
     settings.Name = "RichEdit";
     settings.CallbackRouteValues = new { Controller = "Home", Action = "RichEditPartial" };
})).GetHtml()
}

Posted 9-Jan-22 17:30pm

Sudha Shana

Updated 9-Jan-22 22:40pm

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Chris Copeland 10-Jan-22 4:22am

I won't post this as a solution as I'm not 100% on ASP, but I don't think the delegate keyword is meant to be used like that. Can you try removing the keyword and the parenthesis and try this:

@Html.DevExpress().RichEdit(setting =>
{
settings.Name = "RichEdit";
settings.CallbackRouteValues = new { Controller = "Home", Action = "RichEditPartial" };
}).GetHtml()

Sudha Shana 10-Jan-22 5:53am

Thankyou for your reply

1 solution

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Richard Deeming · Accepted Answer · 2022-01-09T22:40:00

You are trying to use code for the MVC5 version of the control[^]. But you've tagged your question as Blazor, which means you're using the ASP.NET Core version of the control.

The ASP.NET Core version doesn't accept a delegate as a parameter to the RichEdit method. It only accepts a string representing the name of the element:
BuilderFactoryRichEditExtensions.RichEdit(BuilderFactory, String) Method | ASP.NET Core Controls | DevExpress Documentation[^]

There doesn't seem to be an equivalent for the CallbackRouteValues; you will need to consult the documentation[^] and examples[^] to determine how to update your code.