转自：https://www.cnblogs.com/zhaogaojian/p/8343295.html

产生这个问题的原因是因为需要把Band绑定DataSource.有两种方法

(1)DataBand data = report1.Report.FindObject("Data1") as DataBand;

data.DataSource = report1.Report.GetDataSource("Items");

(2)将report1.Show();改成report1.Design();然后选择数据源，然后保存报表。再把report1.Design()替换成report1.Show();

感谢轧钢机

完整代码

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private void button1_Click(object sender, EventArgs e)         {             DataSet FDataSet = new DataSet();             DataTable table = new DataTable();             table.TableName = "Items";             FDataSet.Tables.Add(table);             table.Columns.Add("No", typeof(int));             table.Columns.Add("Name", typeof(string));             table.Columns.Add("money", typeof(decimal));             table.Rows.Add(0,"张三", 123.43);             table.Rows.Add(1, "李四", 123.43);             table.Rows.Add(2, "王五", 123.43);             table.Rows.Add(3, "张龙", 123.43);             table.Rows.Add(4, "赵虎", 123.43);             table.Rows.Add(5,"李四", 223.43);             FastReport.Report report1 = new FastReport.Report();             try             {                 report1.Load(@"C:\Users\zgj\Desktop\Untitled1.frx");                 report1.RegisterData(FDataSet);                                   report1.GetDataSource("Items").Enabled = true;                 DataBand data = report1.Report.FindObject("Data1") as DataBand;                 data.DataSource = report1.Report.GetDataSource("Items");                                   report1.Show();                 report1.Dispose();             }             catch (Exception ex)             {                 MessageBox.Show(ex.Message);                 //throw;             }         }