一：首先定义一个函数来创建内容类型，代码如下：

private SPContentType CreateContentType(SPWeb web, string typeName,string baseTypeName,
string description)
{
    SPContentType contentType = null;
    try
      {
        SPContentType baseType;
        if (string.IsNullOrEmpty(baseTypeName))
        {
            baseType = web.AvailableContentTypes[SPContentTypeId.Empty];
        }
        else
        {
            baseType = web.AvailableContentTypes[baseTypeName];
        }
        contentType = new SPContentType(baseType, web.ContentTypes, typeName);
        contentType.Description = description;
        web.ContentTypes.Add(contentType);
      }
    catch
    {
    }
    return contentType;
}

二：定义两个重载的函数，在函数中先创建网站的field，然后再往内容类型中添加FieldLink

 private SPField AddField(SPContentType contentType, string fieldDisplayName, 

SPFieldType fieldType, bool bRequired)
{
   SPField field = null;
   try
     {
       using (SPWeb web = contentType.ParentWeb)
       {
           web.Fields.Add(fieldDisplayName, fieldType, bRequired);
           field = web.Fields[fieldDisplayName];
           contentType.FieldLinks.Add(new SPFieldLink(field));
       }
     }
     catch
     {
     }
     return field;
}

private SPField AddField(SPContentType contentType, string fieldDisplayName,
                         SPFieldType fieldType, bool bRequired,
                         bool bCompactName, StringCollection choices)
{
     SPField field = null;
     try
       {         
           using (SPWeb web = contentType.ParentWeb)
           {
              web.Fields.Add(fieldDisplayName, fieldType, bRequired, bCompactName, choices);
              field = web.Fields[fieldDisplayName];
              // add a field link to the content type
              contentType.FieldLinks.Add(new SPFieldLink(field));
            }
       }
       catch
       {
       }
       return field;
}

三：下面函数完成向指定网站中添加内容类型的功能

 private void AddContentType(SPWeb web)
{
   if (web != null)
   {
       web.AllowUnsafeUpdates = true;
       SPContentType contentType = CreateContentType(web, "OnlineEvent11", "Event", "OnlineEvent11");
       if (contentType != null)
       {
           StringCollection statusColl = new StringCollection();
           statusColl.Add("Approved");
           statusColl.Add("Rejected");
           AddField(contentType, "Event Status", SPFieldType.Choice,true, false, statusColl);

           AddField(contentType, "Number Of Attendees",SPFieldType.Number, false);

           StringCollection eventType = new StringCollection();
           eventType.Add("Business/Career");
           eventType.Add("Classes & Lectures");
           eventType.Add("Dinners/Galas");
           eventType.Add("Fundraiser");
           eventType.Add("Misc");
           eventType.Add("Seminars");

eventType.Add("Support Groups");
           AddField(contentType, "Type Of Event", SPFieldType.Choice,true, false, eventType);
                    

StringCollection audienceType = new StringCollection();
           audienceType.Add("Adults");
           audienceType.Add("Everyones' Invited");
           audienceType.Add("Families");
           audienceType.Add("Kids");
           audienceType.Add("Men");
           audienceType.Add("Seniors");
           audienceType.Add("Singles");
           audienceType.Add("Teens");
           audienceType.Add("Women");
           AddField(contentType, "Audience Type", SPFieldType.MultiChoice, true, false, audienceType);

           contentType.Update(true);
       }
   }
}

四：.如下代码在feature被激活的时候执行

public override void FeatureActivated(SPFeatureReceiverProperties properties)
{
   if (properties != null)
   {
      SPWeb web = properties.Feature.Parent as SPWeb;
      if (web != null)
      {
          AddContentType(web);
      }
   }
 }

五：由于SPFeatureReceiver是抽象类，所以下面方法也要被重写

public override void FeatureDeactivating(SPFeatureReceiverProperties properties)
{ }
public override void FeatureInstalled(SPFeatureReceiverProperties properties)
{ }
public override void FeatureUninstalling(SPFeatureReceiverProperties properties)
{ }

六：部署成功后，如下图：

本文转自生鱼片博客园博客，原文链接：http://www.cnblogs.com/carysun/archive/2008/07/03/CreateContenttypeByAPI.html，如需转载请自行联系原作者