Merge pull request #6352 from abpframework/maliming/dataType

Set dataType to text for string return values for dynamic JavaScript proxies.

framework/src/Volo.Abp.Http/Volo/Abp/Http/ProxyScripting/Generators/JQuery/JQueryProxyScriptGenerator.cs

@@ -99,9 +99,12 @@ namespace Volo.Abp.Http.ProxyScripting.Generators.JQuery
             AddAjaxCallParameters(script, action);
 
             var ajaxParamsIsFromForm = action.Parameters.Any(x => x.BindingSourceId == ParameterBindingSources.Form);
+            var dataType = action.ReturnValue.Type == ReturnValueApiDescriptionModel.Create(typeof(string)).Type
+                ? "{ dataType: 'text' }, "
+                : string.Empty;
             script.AppendLine(ajaxParamsIsFromForm
-                ? "      }, $.extend(true, {}, ajaxParams, { contentType: 'application/x-www-form-urlencoded; charset=UTF-8' })));"
+                ? "      }, $.extend(true, {}, " + dataType + "{ contentType: 'application/x-www-form-urlencoded; charset=UTF-8' }, ajaxParams)));"
-                : "      }, ajaxParams));");
+                : "      }, " + dataType + "ajaxParams));");
 
             script.AppendLine("    };");
         }