zoukankan      html  css  js  c++  java
  • How to: Access the Report Parameters Object in Calculated Fields Expressions 如何:在计算字段表达式中访问报表参数对象

    This topic describes how you can access data of a report parameters object (inherited from ReportParametersObjectBase and specified using IReportDataV2.ParametersObjectType) in calculated field expressions.

    本主题介绍如何在计算字段表达式中访问报表参数对象的数据(从报表参数对象库继承并使用 IReportDataV2.参数对象类型指定)。

    Note 注意
    The approach described in this topic is not supported by the Mobile platform.
    移动平台不支持本主题中描述的方法。

     

    Override the Parameters Object's ToString method.

    覆盖参数对象的 ToString 方法。

    public class DemoParameters : ReportParametersObjectBase {
        // ...
        public override string ToString() {
            return City;
        }
    }

    As a result, you can refer to the ToString result with the "[Parameters.XafReportParametersObject]" expression, e.g.:

    因此,您可以使用"[参数.XafReport参数对象]" 表达式引用 ToString 结果,例如:

    Concat([Full Name],' from ', [Parameters.XafReportParametersObject])

    Alternatively, you can create a report script, handle the GetValue event of a certain field and then access a parameter value as demonstrated in the How to: Access the Report Parameters Object in Report Scripts topic.

    或者,您可以创建报表脚本,处理特定字段的 GetValue 事件,然后访问参数值,如"如何:在报表脚本中访问报表参数对象"主题中所示。

    private void calculatedFieldCity_GetValue(object sender, DevExpress.XtraReports.UI.GetValueEventArgs e) {
        DevExpress.XtraReports.Parameters.Parameter param =
                (DevExpress.XtraReports.Parameters.Parameter)
                    ((DevExpress.XtraReports.UI.XtraReport)e.Report).Parameters["XafReportParametersObject"];
        if (param != null) {
            ReportV2Demo.Module.BusinessObjects.Contact contact = 
            (ReportV2Demo.Module.BusinessObjects.Contact)e.Row;
            ReportV2Demo.Module.Reports.DemoParameters xafParameter =
                (ReportV2Demo.Module.Reports.DemoParameters)param.Value;
            e.Value = contact.FullName + " from " + xafParameter.City;
        }
    }
  • 相关阅读:
    C#学习笔记_01_基础内容
    C#学习笔记_03_运算符
    C#学习笔记_02_数据类型
    统计学习方法(一)
    《史蒂夫·乔布斯传》读书笔记
    《孵化twitter》读书笔记
    保存和恢复 Android Fragment 的状态
    计算机视觉中的边缘检测
    Android开发的过去、现在和将来
    Python常用的第三方库
  • 原文地址:https://www.cnblogs.com/foreachlife/p/How-to-Access-the-Report-Parameters-Object-in-Calculated-Fields-Expressions.html
Copyright © 2011-2022 走看看