Changing Content Editor Programatically - Client model API?

Question

Is it at all possible to make changes to or add a content editor to a page using only the Client Object Model API? There does not appear to be any reference to a ContentEditorWebPart dll.

Answer 1

You can't use the DLL as usual, you need to provide a Microsoft.SharePoint.Client.WebParts.WebPart, you can get this from WebPartDefinition which you again can get from LimitedWebPartManager.
Then you provide the correct definition, you can get this from exporting the Web Part.
You basically need <Assembly>Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c</Assembly> and <TypeName>Microsoft.SharePoint.WebPartPages.ContentEditorWebPart</TypeName>.

Example:

var ctx = new ClientContext("http://localhost");
var page = ctx.Web.GetFileByServerRelativeUrl("/default.aspx");
var wpm = page.GetLimitedWebPartManager(PersonalizationScope.Shared);
var webPartDefinition = wpm.ImportWebPart(@"
  <?xml version='1.0' encoding='utf-8'?>
  <WebPart xmlns='http://schemas.microsoft.com/WebPart/v2'>
    <Title>Hello, Robert</Title>
    <Assembly>Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c</Assembly>
    <TypeName>Microsoft.SharePoint.WebPartPages.ContentEditorWebPart</TypeName>
    <Content><![CDATA[<strong>The Wheel weaves as the Wheel wills</strong>]]></Content>
  </WebPart>");
wpm.AddWebPart(webPartDefinition.WebPart, "Main", 0);
ctx.ExecuteQuery();