如何加载子报告 [英] How to Load Sub Report

问题描述

我在Crystal Reports中使用了两个子报表.我正在为子报表的设置数据源使用以下编码.主要报告将会到来.但是子报告没有显示.请任何人帮助我.

I am using two subreports in Crystal Reports. I am using following coding for set datasource for the subreport. The main report will come. But the subreport is not displaying. Please anybody help me.

rptdoc.SetDataSource(ds.Tables[0]);
rptdoc.Subreports[0].SetDataSource(ds2.Tables[0]);
rptdoc.Subreports[1].SetDataSource(ds3.Tables[0]);

而且我也尝试了以下代码，错误显示对象引用不是对象的实例"

And also I tried this following code, the error displays "the object reference is not to an instance of an object"

rptdoc.OpenSubreport("SALESTRANSACTION").SetDataSource(ds2);
rptdoc.OpenSubreport("RECEIPTTRANSACTION").SetDataSource(ds2);

推荐答案

似乎，您正在使用空对象?你调试过代码了吗?在哪一行生成此异常?

It seems that , you are using a null object? have you debugged your code? In which line this exception is generated?

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