Bootstrap Wysihtml5 Set Value Not Working
Answer : You should be able to achieve the same using below $("#<%=txtDescrizioneBreveCategoria.ClientID%>").wysihtml5(); window.describeEditor = window.editor; And then later you should can use describeEditor.setValue(c.DescrizioneBreve, true) or use editorDescrizioneBreve.data("wysihtml5").editor.setValue(c.DescrizioneBreve, true); Where editorDescrizioneBreve is the object returned by $("#<%=txtDescrizioneBreveCategoria.ClientID%>").wysihtml5() PS: Solution based on https://github.com/jhollingworth/bootstrap-wysihtml5/issues/52 For me, this worked: $('.wysihtml5-sandbox').contents().find('body').html(descr) I have only one Wysihtml5 on my page, with multiple, you need to use more precise selector.