将多个参数传递给 Crystal Report

Question

我正在开发 Visual Studio 2008 和 SQL Server 2008，语言 C#

我想在 ASP.NET 中将多个参数传递给 Crystal Report。我有两个参数@accountnumber 和@customerid。但我只能将一个参数传递给我的报告，如下面的代码所示。

CrystalReportViewer1.LogOnInfo[0].ConnectionInfo.ServerName = "CJ-PC";
CrystalReportViewer1.LogOnInfo[0].ConnectionInfo.UserID = "sa";
CrystalReportViewer1.LogOnInfo[0].ConnectionInfo.Password = "***";
CrystalReportViewer1.LogOnInfo[0].ConnectionInfo.DatabaseName = "Online";

string accountnumber = "acc001";
string customerID = "cus001";

ParameterField paramField = new ParameterField();
ParameterFields paramFields = new ParameterFields();
ParameterDiscreteValue paramDiscreteValue = new ParameterDiscreteValue();

paramField.Name = "@account_number";
paramDiscreteValue.Value = accountnumber;
paramField.CurrentValues.Add(paramDiscreteValue);
paramFields.Add(paramField);
CrystalReportViewer1.ParameterFieldInfo = paramFields;

ParameterField paramField1 = new ParameterField();
ParameterFields paramFields1 = new ParameterFields();
ParameterDiscreteValue paramDiscreteValue1 = new ParameterDiscreteValue();

paramField1.Name = "@account_number";
paramDiscreteValue1.Value = accountnumber;
paramField1.CurrentValues.Add(paramDiscreteValue1);
paramFields1.Add(paramField1);

paramField1.Name = "@customer_id";
paramDiscreteValue1.Value = customerID;
paramField1.CurrentValues.Add(paramDiscreteValue1);
paramFields1.Add(paramField1);
CrystalReportViewer1.ParameterFieldInfo = paramFields1;

Answer 1

在为 paramField1 分配新值之前，您必须使用 new 关键字

paramField1.Name = "@account_number";
paramDiscreteValue1.Value = accountnumber;
paramField1.CurrentValues.Add(paramDiscreteValue1);
paramFields1.Add(paramField1);

//Here is the missing code
paramField1 = new ParameterField();

paramField1.Name = "@customer_id";
paramDiscreteValue1.Value = customerID;
paramField1.CurrentValues.Add(paramDiscreteValue1);
paramFields1.Add(paramField1);

Answer 2

如果上述代码对您没有帮助，请按照以下说明进行操作：

转到CrystalReportSource 属性-> Report 属性-> Paratemers 属性-> Add new parameter

然后就可以了。您必须将参数命名为 @account_number 并给它一个 ControlID

Answer 3

这就是我在代码中所做的

CrystalReportViewer1.RefreshReport();

String ssCustomer = Session["ssCustomer"].ToString();
string strconstring = ConfigurationManager.ConnectionStrings["ONLINE_BANKING2_ConnectionString"].ConnectionString;
string sqlquery2;
sqlquery2 = "SELECT [account_number],[customer_id] from customer_details where customer_id = '" + ssCustomer + "'";
SqlConnection mycon2 = new SqlConnection(strconstring);
SqlCommand cmd = new SqlCommand(sqlquery2, mycon2);
mycon2.Open();
SqlDataReader myreader = cmd.ExecuteReader();
myreader.Read();
string accountnumber = myreader["account_number"].ToString();
string customerID = myreader["customer_id"].ToString();
myreader.Close();
mycon2.Close();

ParameterDiscreteValue objDiscreteValue;
ParameterField objParameterField;

//specify all the database Login details
CrystalReportViewer1.LogOnInfo[0].ConnectionInfo.ServerName = "CJ-PC";
CrystalReportViewer1.LogOnInfo[0].ConnectionInfo.UserID = "sa";
CrystalReportViewer1.LogOnInfo[0].ConnectionInfo.Password = "123";
CrystalReportViewer1.LogOnInfo[0].ConnectionInfo.DatabaseName = "online_banking2";

//Set value for first parameter
objDiscreteValue = new ParameterDiscreteValue();
objDiscreteValue.Value = accountnumber;
objParameterField = CrystalReportViewer1.ParameterFieldInfo["@account_number"];
objParameterField.CurrentValues.Add(objDiscreteValue);
CrystalReportViewer1.ParameterFieldInfo.Add(objParameterField);

objParameterField = CrystalReportViewer1.ParameterFieldInfo["@customer_id"];
objDiscreteValue = new ParameterDiscreteValue();
objDiscreteValue.Value = customerID;
objParameterField.CurrentValues.Add(objDiscreteValue);
CrystalReportViewer1.ParameterFieldInfo.Add(objParameterField);

Answer 4

您可以按照这种方式将值传递给Crystal Reports中的各种参数。

void SetParameterValues()
{
    crReport report = new crReport();
    report.SetParameterValue("parameterName1","parameterValue1");
    report.SetParameterValue("parameterName2","parameterValue2");
}