使用sqlcommand填充reportviewer但只从一个表中填入选定的字段如何添加另一个表？

Question

我正在开发一个etime历史应用程序，数据从adp应用程序带入sql。

要求

用户希望查看特定员工的旧时间表信息

过程

用户点击1）paygroup从下拉菜单2）员工下拉菜单按薪资组分组3）选择（从日期）和（到日期）4）点击运行报告并填写数据< /强>

完美填充下拉列表的工作，当我点击运行报告时，只有列paygroup，empid和日期被填充但是列DeptNo，WorkCenterID，JobCode，InPunch，OutPunch没有被填满。哦，正在填写的列在EtimePunchDetail表中，其他人在EtimeEmployees中，我如何使用EtimeEmployees和我的SqlCommand中的字段是我的问题？这些字段不是参数，所以我感到困惑，因为其他的是参数......

我用来填充列的代码

private void button1_Click(object sender, EventArgs e) //run report button loads all the pieces onto the report.
        {

            if (FromDate.Value > ToDate.Value)
            {
                MessageBox.Show("From Date Must be Less Than To Date");
            }
            else
                //fileexport
                using (MSSQL.SqlConnection connection = new MSSQL.SqlConnection(constr))
                {
                    timepunchnew = new EtimeHistoryDataSet();
                    connection.Open();
                    MSSQL.SqlCommand command = new MSSQL.SqlCommand("SELECT * From EtimePunchDetail WHERE (EmpID = @empid) And  (Paygroup = @paygroup) And (TransDate >= @fromdate) And (TransDate <= @todate)", connection);
                    {

                        MSSQL.SqlParameter parmEmp = new MSSQL.SqlParameter();
                        parmEmp.ParameterName = "@empid";
                        parmEmp.Value = Employee.SelectedValue;
                        command.Parameters.Add(parmEmp);

                        MSSQL.SqlParameter paramPayGroup = new MSSQL.SqlParameter();
                        paramPayGroup.ParameterName = "@paygroup";
                        paramPayGroup.Value = Paygroup.SelectedValue;
                        command.Parameters.Add(paramPayGroup);

                        MSSQL.SqlParameter paramFromDate = new MSSQL.SqlParameter();
                        paramFromDate.ParameterName = "@fromdate";
                        paramFromDate.DbType = DbType.DateTime;
                        paramFromDate.SqlDbType = SqlDbType.DateTime;
                        paramFromDate.Value = FromDate.Value.ToString("");
                        command.Parameters.Add(paramFromDate);

                        MSSQL.SqlParameter paramToDate = new MSSQL.SqlParameter();
                        paramToDate.ParameterName = "@todate";
                        paramToDate.DbType = DbType.DateTime;
                        paramToDate.SqlDbType = SqlDbType.DateTime;
                        paramToDate.Value = ToDate.Value;;
                        command.Parameters.Add(paramToDate);

                        MSSQL.SqlDataAdapter EtimePunchDetailTableAdapter = new System.Data.SqlClient.SqlDataAdapter();
                        EtimePunchDetailTableAdapter.SelectCommand = command;
                        EtimePunchDetailTableAdapter.Fill(timepunchnew, "Etime");

                        string exeFolder = Path.GetDirectoryName(Application.ExecutablePath);
                        string reportPath = exeFolder + @"\Report1.rdlc";

                        reportViewer1.LocalReport.DisplayName = MakeValidFileName(Employee.Text) + "-" + FromDate.Value.ToString("MM") + "!" + (FromDate.Value.ToString("dd")) + "!" + FromDate.Value.ToString("yyyy") + "-" + ToDate.Value.ToString("MM") + "!" + ToDate.Value.ToString("dd") + "!" + ToDate.Value.ToString("yyyy");

                        reportViewer1.LocalReport.ReportPath = reportPath;

                        reportViewer1.LocalReport.DataSources.Clear();

                        reportViewer1.LocalReport.DataSources.Add(new Microsoft.Reporting.WinForms.ReportDataSource("EtimeHistoryDataSet_Etime", timepunchnew.Etime));

                        reportViewer1.RefreshReport();
                        reportViewer1.Refresh();
                        reportViewer1.Visible = true;

                    }
                }
        }

Answer 1

您可以在SQL语句中添加连接以从另一个表中获取记录。

在你的情况下......

SELECT pd.*, e.EmployeeNameOrWhateverFieldYouWant 
FROM EtimePunchDetail pd  INNER JOIN EtimeEmployee e ON e.EmpID = pd.EmpID   
WHERE (pd.EmpID = @empid) And  (pd.Paygroup = @paygroup) 
And (pd.TransDate >= @fromdate) And (pd.TransDate <= @todate)

请注意添加表别名，这使得引用表更方便，因为您需要限定两个表中存在的任何字段（否则SQL无法告诉您哪个表）试图从中获取数据并抛出错误。）

如果您需要使用它们来过滤结果，您只需要将employee表中的字段作为参数添加。他们在选择列表中工作得很好。