在vs2005中使用Com连接SAP系统-Form方式

原文地址：/article/5727947.html

一，添加对Interop.SAPFunctionsOCX.dll以及Interop.SAPLogonCtrl.dll这两个com组件的引用。

二，通过SAPLogonCtrl进行SAP系统的登录，输入登陆SAP系统需要的一些参数，具体参见如下代码：

SAPLogonCtrl.SAPLogonControlClass logon = new SAPLogonCtrl.SAPLogonControlClass();
logon.ApplicationServer = ""; //SAP system's IP
logon.Client = ""; //SAP system'client
logon.Language = "EN";
logon.User = ""; //Username
logon.Password = ""; //Password
logon.SystemNumber = 00; //System number
SAPLogonCtrl.Connection conn = (SAPLogonCtrl.Connection)logon.NewConnection();

三，登陆成功后，通过SAPFunctionsOCX对SAP中的Function Module进行调用。具体步骤为：首先创建SAPFunctionsOCX.SAPFunctionsClass的实例func ，并设置其需要使用的Connection；然后使用func的Add方法添加需要调用的function module的名称（返回一个SAPFunctionsOCX.IFunction对象ifunc）；再使用ifunc的get_Exports方法获取function module中的输入参数，最后对参数进行赋值；然后再调用ifunc的call方法进行调用；最后使用ifunc的get_Imports或者Tables方法获取返回值。具体参见如下代码：

if (conn.Logon(0, true)) //login successful
{
SAPFunctionsOCX.SAPFunctionsClass func = new SAPFunctionsOCX.SAPFunctionsClass();
func.Connection = conn;
SAPFunctionsOCX.IFunction ifunc = (SAPFunctionsOCX.IFunction)func.Add("ENQUEUE_READ"); //Call Function module 'ENQUEUE_READ'
SAPFunctionsOCX.IParameter gclient = (SAPFunctionsOCX.IParameter)ifunc.get_Exports("GCLIENT"); //Get the import paremeter
gclient.Value = "301"; //Set value for import paremeter
SAPFunctionsOCX.IParameter GUNAME = (SAPFunctionsOCX.IParameter)ifunc.get_Exports("GUNAME");
GUNAME.Value = "";
SAPFunctionsOCX.IParameter LOCAL = (SAPFunctionsOCX.IParameter)ifunc.get_Exports("LOCAL");
LOCAL.Value = "0";
ifunc.Call();
SAPFunctionsOCX.IParameter NUMBER = (SAPFunctionsOCX.IParameter)ifunc.get_Imports("SUBRC");
SAPTableFactoryCtrl.Tables ENQs = (SAPTableFactoryCtrl.Tables)ifunc.Tables; //get all the tables
SAPTableFactoryCtrl.Table ENQ = (SAPTableFactoryCtrl.Table)ENQs.get_Item("ENQ"); //Get table 'ENQ'
int n = ENQ.RowCount;
DataTable dt = CreateTable();
for (int i = 1; i <= n; i++)
{
DataRow dr = dt.NewRow();
dr["GNAME"] = ENQ.get_Cell(i, "GNAME").ToString(); //Get cell information
dr["GUNAMe"] = ENQ.get_Cell(i, "GUNAME").ToString();
dr["GARG"] = ENQ.get_Cell(i, "GARG").ToString();
dr["GOBJ"] = ENQ.get_Cell(i, "GOBJ").ToString();
dr["GTDATE"] = ENQ.get_Cell(i, "GTDATE").ToString();
dt.Rows.Add(dr);
}
dataGridView1.DataSource = dt;
dataGridView1.Visible = true;
label1.Text = "Get data from FM 'ENQUEUE_READ' OK!";
}
else
label1.Text = "NO";
}
这样就可以在form中调用SAP ECC中的