我的报表查看器rdlc报表未显示数据。c#sql 08

我的报表查看器rdlc报表未显示数据。报告完全是空白的。我检查了在数据集表适配器中编写的查询，它是正确的。我尽我所能尝试了一切，但数据无法加载。我就是想不出是什么问题。 我的另一份报告使用了相同的代码，我已附上了差异表。代码为：

命名空间BillingMaster { 公共部分类ReportAllForm3:表单 { 公共报告格式3（） { 初始化组件（）； }

    private void ReportAllForm3_Load(object sender, EventArgs e)
    {
        // TODO: This line of code loads data into the 'ReportAllDataset3.BillingDetails' table. You can move, or remove it, as needed.
       // this.BillingDetailsTableAdapter.Fill(this.ReportAllDataset3.BillingDetails);

  this.reportViewer1.RefreshReport();
    }

    private void btnShow_Click(object sender, EventArgs e)
    {

        this.BillingDetailsTableAdapter.Fill(this.ReportAllDataset3.BillingDetails, dateTimePicker1.Value.Date.ToShortDateString(), dateTimePicker2.Value.Date.ToShortDateString());
        this.reportViewer1.RefreshReport();
    }
}

}

    private void ReportAllForm3_Load(object sender, EventArgs e)
    {
        // TODO: This line of code loads data into the 'ReportAllDataset3.BillingDetails' table. You can move, or remove it, as needed.
       // this.BillingDetailsTableAdapter.Fill(this.ReportAllDataset3.BillingDetails);

  this.reportViewer1.RefreshReport();
    }

    private void btnShow_Click(object sender, EventArgs e)
    {

        this.BillingDetailsTableAdapter.Fill(this.ReportAllDataset3.BillingDetails, dateTimePicker1.Value.Date.ToShortDateString(), dateTimePicker2.Value.Date.ToShortDateString());
        this.reportViewer1.RefreshReport();
    }
}

我只将日期列作为日期数据类型。 我正在写以下问题：

从dbo.BillingDetails中选择SrNo、Package、Type、disper、DiscAmt、TotalAmt、noofttkts、BillNo、TaxAmt、Rate、BillNoTop、PackageTop、DiscperTop、discamtop、TaxPerc、datefrom dbo.BillingDetails，其中日期介于@date1和@date2之间，按BillNo订购

谁能告诉我该怎么办