開發自定義參照功能元

自訂參考的功能元不會將程式實作碼內嵌複製到映射中。 相反地，組件、類別和方法的參考會放在與產生的樣式表相關聯的延伸物件檔案中，並在運行時間呼叫。

範例

下列範例說明如何建立自訂的函數來串接兩個字串。 它依賴包含三個字串資源和16x16像素圖資源的資源檔。

using System;  
using Microsoft.BizTalk.BaseFunctoids;  
using System.Reflection;  
  
namespace Microsoft.Samples.BizTalk.CustomFunctoid  
{  
    /// <summary>  
    /// Performs a string concatenation through assembly referenced function. Assembly must be deployed with the BizTalk solution.  
    /// </summary>  
    public class CustomStringConcatFunctoid : BaseFunctoid  
    {  
        public CustomStringConcatFunctoid()  
            : base()  
        {  
            //ID for this functoid  
            this.ID = 6001;  
  
            // Resource assembly must be ProjectName.ResourceName if building with VS.Net  
            SetupResourceAssembly("Microsoft.Samples.BizTalk.CustomFunctoid.CustomFunctoidResources", Assembly.GetExecutingAssembly());  
  
            // Pass the resource ID names for functoid name, tooltip  
            // description and the 16x16 bitmap for the Map palette  
            SetName("IDS_CUSTOMSTRINGCONCATFUNCTOID_NAME");  
            SetTooltip("IDS_CUSTOMSTRINGCONCATFUNCTOID_TOOLTIP");  
            SetDescription("IDS_CUSTOMSTRINGCONCATFUNCTOID_DESCRIPTION");  
            SetBitmap("IDB_CUSTOMSTRINGCONCATFUNCTOID_BITMAP");  
  
            // Put this string handling function under the String   
            // Functoid tab in the Visual Studio toolbox for functoids  
            this.Category = FunctoidCategory.String;  
  
            // 2 required parameters, no optional parameters  
            this.SetMinParams(2);  
            this.SetMaxParams(2);  
  
            // Functoid accepts two inputs  
            AddInputConnectionType(ConnectionType.AllExceptRecord);  
            AddInputConnectionType(ConnectionType.AllExceptRecord);  
  
            // Set the output connection type  
            this.OutputConnectionType = ConnectionType.AllExceptRecord;  
  
            // Set the function name that needs to be called  
            // when this functoid is invoked.  The resulting assembly  
            // must be present in the Global Assembly Cache  
            // to ensure its availability.  
            SetExternalFunctionName(GetType().Assembly.FullName, "Microsoft.Samples.BizTalk.CustomFunctoid.CustomStringConcatFunctoid", "ConCatStrings");  
        }  
  
        // This function is executed by BizTalk to do the concatenation  
        public string ConCatStrings(string val1, string val2)  
        {  
            return val2 + val1;  
        }  
    }  
}  

另請參閱

使用BaseFunctoid
開發自定義內嵌功能元件
開發自定義累計功能元件
自訂函式元 （BizTalk Server 範例）