分享微博按钮的简单实现，

/// <summary>
    /// 微博接口链接获取
    /// </summary>
    /// <param name="linkId"></param>
    /// <returns></returns>
    protected string GetLinkUrl(string linkId)
    {
        string linkUrl = string.Empty;

        switch (linkId)
        {
            case "1"://新浪微博
                linkUrl = "http://service.weibo.com/share/share.php?";
                break;
            case "2"://腾讯的微博
                linkUrl = "http://share.v.t.qq.com/index.php?c=share&a=index&";
                break;
            case "3"://福娃域名
                linkUrl = "http://www.fuwa.com";
                break;
            case "4"://人人网  
                linkUrl = "http://share.renren.com/share/buttonshare/post/1004?";
                break;
            case "5"://开心网  
                linkUrl = "http://www.kaixin001.com/repaste/share.php?";
                break;
            default:
                linkUrl = "http://www.fuwa.com";
                break;
        }
        return linkUrl;
    }
    /// <summary>
    /// 返回分享链接
    /// </summary>
    /// <param name="source"></param>
    /// <param name="prod"></param>
    /// <returns></returns>
    protected string GetShareUrl(string source,ProductInfo prod)
    {

        StringBuilder arguments = new StringBuilder();
 
        string url =GetLinkUrl("3")+ prod.ProdUrl;
        string title = HttpUtility.UrlEncode("我刚刚在@http://www.fuwa.com【大嘴福娃食品网】发现了一个不错的商品：" + prod.ProductName + "  福娃价：￥" + prod.Price.ToString("f2") + "  感觉不错分享一下!");
        string pic =  prod.GetImage(1, 1);
        string appkey = string.Empty;
        string content = title;
 
        switch (source)
        {
            case "sina":
                appkey = "3739060516";
                arguments.AppendFormat("{0}url={1}&title={2}&pic={3}&appkey={4}", GetLinkUrl("1"), url, title, pic, appkey);
                break;
            case "qq":
                 appkey = "3739060516"; 
                 string site = GetLinkUrl("3");
                arguments.AppendFormat("{0}url={1}&title={2}&pic={3}&appkey={4}&content={5}&site={6}", GetLinkUrl("2"), url, title, pic, appkey,content,site);
                break;
           case "kaixin": 
                arguments.AppendFormat("{0}rurl={1}&rtitle={2}&pic={3}&rcontent={4}", GetLinkUrl("5"),url, title, pic,content);
                break;
           case "renren":
                arguments.AppendFormat("{0}url={1}&title={2}&pic={3}", GetLinkUrl("4"), url, title, pic);
                break;
            default:
                break;
        }
        return arguments.ToString();
    }