我有三个类(Employee,EmployeeCard和Children)像这样实现
public class Employee
{
public Employee()
{
Children = new List<Child>();
}
public virtual string FirstName { get; set; }
public virtual string LastName { get; set; }
public virtual EmployeeCard EmployeeCard { get; set; }
public virtual IList<Child> Children { get; protected set; }
public virtual void AddChild(Child child)
{
child.Employee = this;
Children.Add(child);
}
public static List<Employee> GetData()
{
List<Employee> empList = new List<Employee>();
for(i=0;i<5;i++)
{
Employee emp = new Employee();
emp.FirstName = "Fname" + i.ToString();
emp.LastName = "Lname" + i.ToString();
emp.EmployeeCard = new EmployeeCard();
emp.EmployeeCard.StartWorkingDate = DateTime.Now.Date.AddDays(-i);
empList.Add(emp);
for(int j=0;j<2;j++)
{
Children child = new Children();
child.FirstName = "ChildFname" + j.ToString();
child.LastName = "ChildLname" + j.ToString();
empList.Children.Add(child);
}
}
return empList;
}
}
public class Child
{
public virtual string FirstName { get; set; }
public virtual string LastName { get; set; }
public virtual Employee Employee { get; set; }
}
public class EmployeeCard
{
public virtual Employee Employee { get; set; }
public virtual DateTime? StartWorkingDate { get; set; }
}
当我在运行时将员工列表绑定到报表时出现此错误
无法绑定到提供的数据源,因为它不受支持或 未在我们支持的界面中实现。
当我从员工类中删除参考员工卡时它完美无缺。如何使用员工列表将employeecard的详细信息绑定到报告中?
以下是how I created the xtraReports
的示例代码这是我构建员工对象并将其绑定到报告的方式
XtraReport report = new XtraReport();
List<Employee> ReportDataSource = Employee.GetData();
ReportHeaderBand headerBand = new ReportHeaderBand() {
HeightF = 80
};
report.Bands.Add(headerBand);
headerBand.Controls.Add(new XRLabel() {
Text = "Employee Report",
SizeF = new SizeF(650, 80),
TextAlignment = TextAlignment.BottomCenter,
Font = new Font("Arial", 36)
});
DetailBand detailBandEmployee = new DetailBand();
var detailReportBandEmployee = new DetailReportBand
{
KeepTogether = true,
DataMember ="",
DataSource = ReportDataSource
};
detailReportBandEmployee.Bands.Add(detailBandEmployee);
XRLabel lbFname = new XRLabel() {
LocationF = new PointF(200, 10),
SizeF = new SizeF(440, 50),
TextAlignment = TextAlignment.BottomLeft,
Font = new Font("Arial", 24)
};
detailBandEmployee.Controls.Add(lbFname);
lbFname.DataBindings.Add("Text", null, "FirstName");
XRLabel lbLastName = new XRLabel() {
LocationF = new PointF(200, 60),
SizeF = new SizeF(440, 40),
TextAlignment = TextAlignment.TopLeft,
Font = new Font("Arial", 14, FontStyle.Italic)
};
detailBandEmployee.Controls.Add(lbLastName);
lbLastName.DataBindings.Add("Text", null, "LastName");
DetailBand detailBandEmployeeChild = new DetailBand();
var detailReportBandEmployeeChild = new DetailReportBand
{
KeepTogether = true,
DataMember = "Children",
DataSource = ReportDataSource
};
detailReportBandEmployeeChild.Bands.Add(detailBandEmployeeChild);
XRLabel lbChildFname = new XRLabel()
{
LocationF = new PointF(200, 10),
SizeF = new SizeF(440, 50),
TextAlignment = TextAlignment.BottomLeft,
Font = new Font("Arial", 24)
};
detailBandEmployeeChild.Controls.Add(lbChildFname);
lbChildFname.DataBindings.Add("Text", null, "FirstName");
XRLabel lbChildLastName = new XRLabel()
{
LocationF = new PointF(200, 60),
SizeF = new SizeF(440, 40),
TextAlignment = TextAlignment.TopLeft,
Font = new Font("Arial", 14, FontStyle.Italic)
};
detailBandEmployeeChild.Controls.Add(lbChildLastName);
lbChildLastName.DataBindings.Add("Text", null, "LastName");
DetailBand detailBandEmployeeCard = new DetailBand();
var detailReportBandEmployeeCard = new DetailReportBand
{
KeepTogether = true,
DataMember = "EmployeeCard ",
DataSource = ReportDataSource
};
detailReportBandEmployeeCard.Bands.Add(detailBandEmployeeCard);
XRLabel lbStartDate = new XRLabel()
{
LocationF = new PointF(200, 10),
SizeF = new SizeF(440, 50),
TextAlignment = TextAlignment.BottomLeft,
Font = new Font("Arial", 24)
};
detailBandEmployeeCard.Controls.Add(lbStartDate);
lbStartDate.DataBindings.Add("Text", null, "StartWorkingDate");
detailReportBandEmployee.Bands.Add(detailReportBandEmployeeCard);
detailReportBandEmployee.Bands.Add(detailReportBandEmployeeChild);
report.Bands.Add(detailReportBandEmployee);
答案 0 :(得分:2)
问题是您为此卡创建了详细信息区域
var detailReportBandEmployeeCard = new DetailReportBand
{
KeepTogether = true,
DataMember = "EmployeeCard",
DataSource = ReportDataSource
};
并将数据源绑定到此属性
public virtual EmployeeCard EmployeeCard { get; set; }
您只能将列表用作数据源,而EmployeCard不是列表。 如果您只有一个对象,则不需要detailBandEmployeeCard,您可以将标签直接放入detailBandEmployee
XRLabel lbStartDate = new XRLabel()
{
LocationF = new PointF(200, 10),
SizeF = new SizeF(440, 50),
TextAlignment = TextAlignment.BottomLeft,
Font = new Font("Arial", 24)
};
//detailBandEmployeeCard.Controls.Add(lbStartDate);
//lbStartDate.DataBindings.Add("Text", null, "StartWorkingDate");
detailBandEmployee.Controls.Add(lbLastName);
lbStartDate.DataBindings.Add("Text", null, "EmployeeCard.StartWorkingDate");
GetData()使用一个类Child,它应该是Child,也不要填充列表。我认为循环必须是这样的
for (int j = 0; j < 2; j++)
{
Child child = new Child();
child.FirstName = "ChildFname" + j.ToString();
child.LastName = "ChildLname" + j.ToString();
emp.AddChild(child);
}