SplendidCRM添加Dropdownlist并绑定来自SQL的数据

SplendidCRM系统通常是先从SQL中取出要用的数据，存入系统的cache中以备调用，主要是为了减少反复读数据库导致的负载。

现在，我要创建一个名为Accounts的DropdownList，并将Accounts模块的vmAccounts视图中的NAME数据绑定到这个DropdownList，步骤如下：

1. 在\Administration\DynamicLayout\_code\NewRecord.cs的Page_Load方法中的string[] arrCachedLists = new string[]数组中添加一个新的字段值，

        private void Page_Load(object sender, System.EventArgs e)
        {
            if ( !this.IsPostBack || lstLIST_NAME.Items.Count == 0 )
            {
                try
                {
                    DbProviderFactory dbf = DbProviderFactories.GetFactory();
                    using ( IDbConnection con = dbf.CreateConnection() )
                    {
                        con.Open();
                        string sSQL;
                        sSQL = "select LIST_NAME             " + ControlChars.CrLf
                             + "  from vwTERMINOLOGY_PickList" + ControlChars.CrLf
                             + " order by LIST_NAME          " + ControlChars.CrLf;
                        using ( IDbCommand cmd = con.CreateCommand() )
                        {
                            cmd.CommandText = sSQL;
                            using ( DbDataAdapter da = dbf.CreateDataAdapter() )
                            {
                                ((IDbDataAdapter)da).SelectCommand = cmd;
                                DataTable dt = new DataTable();
                                da.Fill(dt);                                

                              string[] arrCachedLists = new string[]
                                    { ""
                                    , "AssignedUser"
                                    , "Currencies"
                                    , "Release"
                                    , "Manufacturers"
                                    , "Shippers"
                                    , "ProductTypes"
                                    , "ProductCategories"
                                    , "ContractTypes"
                                    , "ForumTopics"
                                    , "Accounts" //加入模块名accounts到arrCachedLists数组
                                    };
                                for ( int i = 0; i < arrCachedLists.Length; i++ )
                                {
                                    DataRow row = dt.NewRow();
                                    row["LIST_NAME"] = arrCachedLists[i];
                                    dt.Rows.InsertAt(row, i);
                                }

//绑定dt table的数据dropdownlist类型的lstLIST_NAME 
                                lstLIST_NAME.DataSource = dt.DefaultView; 

                                lstLIST_NAME.DataBind();
                            }
                        }
                    }
                    lstFIELD_TYPE_Changed(null, null);
                }
                catch(Exception ex)
                {
                    SplendidError.SystemError(new StackTrace(true).GetFrame(0), ex);
                    lblError.Text = ex.Message;
                }
            }
        }

2. 在_code\SplendidCache.cs中添加一个方法，用来将vmAccounts视图中的NAME数据存入CACHE, 代码如下：

        public static DataTable Accounts()
        {
            System.Web.Caching.Cache Cache = HttpRuntime.Cache;
            DataTable dt = Cache.Get("vwACCOUNTS") as DataTable;
            if (dt == null)
            {
                try
                {
                    DbProviderFactory dbf = DbProviderFactories.GetFactory();
                    using (IDbConnection con = dbf.CreateConnection())
                    {
                        con.Open();
                        string sSQL;
                        sSQL = "select ID                          " + ControlChars.CrLf
                             + "     , NAME                        " + ControlChars.CrLf
                             + "  from vwACCOUNTS" + ControlChars.CrLf
                             + " order by DATE_ENTERED              " + ControlChars.CrLf;
                        using (IDbCommand cmd = con.CreateCommand())
                        {
                            cmd.CommandText = sSQL;
                            using (DbDataAdapter da = dbf.CreateDataAdapter())
                            {
                                ((IDbDataAdapter)da).SelectCommand = cmd;
                                dt = new DataTable();
                                da.Fill(dt);
                                Cache.Insert("vwACCOUNTS", dt, null, DefaultCacheExpiration(), Cache.NoSlidingExpiration);
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    SplendidError.SystemError(new StackTrace(true).GetFrame(0), ex);
                    // 10/16/2005 Paul. Ignore list errors. 
                }
            }
            return dt;
        }

 

代码截图：

 

3.在 public class SplendidCache 的CustomCaches 数组中加入一行Accounts的语句：

, new SplendidCacheReference("Accounts"          , "ID"         , "NAME"        , new SplendidCacheCallback(SplendidCache.Accounts          ))

代码截图：

4. 在Admin页面中将Books的EditView, DetailView和ListView中的Book_Concern都从原来的Textbox改为ListBox，使用新创建的Accounts Dropdownlist作为Book_Concern的下拉列表。

5. 打开新建BOOK的页面（editview），看到Book_Concern的下拉列表的数据已经成功的绑定到了Accounts模块。

Book_EditView:

Book_ListView:

Book_ListView:(GridView)

搞定，收工！