c# – 如何将参数传递给Crystal Report for Visual Studio 2010

它们显示在报告中,在选择公式时忽略了！这是我创建报告和传递参数的代码.

private void Prepare()
    {
        var reportDocument = new ReportDocument();

        string reportPath = string.Format(
            "{0}{1}",Globals.FormPath,this.FormTemplate.Filename);

        reportDocument.Load(reportPath);

        ParameterDiscreteValue parameter;

        foreach (var control in this.FormTemplateFieldControls)
        {
            switch (control.FormTemplateField.DataType)
            {
                case FormFieldDataType.Date:
                    this.AddParameterForDateTime(
                        reportDocument,control.FormTemplateField.Name,(DateTime)control.EditValue);
                    break;
                case FormFieldDataType.DateTime:
                    this.AddParameterForDateTime(
                        reportDocument,(DateTime)control.EditValue);
                    break;
                case FormFieldDataType.Time:
                    this.AddParameterForDateTime(
                        reportDocument,(DateTime)control.EditValue);
                    break;
                case FormFieldDataType.Guid:
                    this.AddParameterForGuid(
                        reportDocument,(Guid)control.EditValue);
                    break;
                default:
                    this.AddParameterForString(
                        reportDocument,control.EditValue.ToString());
                    break;
            }
        }

        this.SetConnectionInfo(reportDocument);

        var frm = new FormViewer();

        frm.Report = reportDocument;

        frm.ShowDialog();

        frm.Dispose();

        this.Close();
    }

当我从设计师运行报告时它工作得很好.当我在报告中显示参数时,您可以看到参数正在传递.

对于从存储过程运行的报表,参数似乎传递得很好,它只是由所有表组成的参数.

对于它的价值,这是我的选择公式：

{employee.HireDate} >= {?StartDate} And {employee.HireDate} <= {?EndDate}