c#主窗體向子窗體上的報表傳參數

• 1.在子窗體中定義變量

視圖-報表數據-參數-添加參數，設置數據名稱、類型

• 2.子窗體添加文本框

文本框-表達式-參數-”添加的數據名“

• 3.主窗體添加時間控件

• 4.主函數中定義全局變量

 public partial class main_dialog : Form
    {         ...

          public string DateTimePicker6;

    }

• 5.類視圖中將變量公有化

public string DateTimePicker6; 改成public static string DateTimePicker6;

• 6.查詢按鈕下進行參數值傳遞

private void button4_Click(object sender, EventArgs e)
        {  ...

            DateTimePicker6=dateTimePicker6.Text;

       }

• 7.子窗體報表數據加載

  private void Form5_Load(object sender, EventArgs e)
        {   ...

            this.reportViewer1.LocalReport.ReportEmbeddedResource = "WODEXITONG.CarInfo.rdlc";
            ReportParameter rp1 = new ReportParameter("datefield", main_dialog.DateTimePicker6);
            this.reportViewer1.LocalReport.SetParameters(new ReportParameter[] { rp1 }); 
           ...
            this.CarInfoTableAdapter.Fill(this.dbbaseDataSet.CarInfo);
            reportViewer1.RefreshReport();

         }