OK尝试我的建议....

• 验证报告中的数据库
• 确认您在数据集中或数据表中有数据
• 为数据集&数据表与报表中的数据相同.
如果报表中的表名称为Table1，则您的代码应如下所示.

OK Try my suggestions....

• Verify database in the report
• Confirm you have data in the dataset or datatable
• Give the name for Dataset & Datatable same as in the report.
If the table name is Table1 in report then your code should be like below.

DataTable dt = new DataTable("Table1");

与数据集也相同.
如果报表中的数据集名称为Dataset1，则您的代码应如下所示.

Also the same to dataset.
If the dataset name is Dataset1 in report then your code should be like below.

DataSet ds = new DataSet1("Dataset1");