如何将参数传递给在ASP.NET Web应用程序中具有对象数据源的本地报表？

Question

我想将参数传递给具有对象数据源的本地报表（从需要参数的c＃方法获取数据列表），该怎么办？

    #region Parameterized Report
            ReportViewer1.ProcessingMode = ProcessingMode.Local;
            string FolderPath = Server.MapPath("~/LocalReports");
            string ReportName = "ParameterizedReportWizard.rdlc";
            string DataSetName = "DataSet1Parameter";
            string SelectedMethod = "GetSomeEmployees";
            string Parameter = "ID";

            ReportViewer1.LocalReport.ReportPath = Path.Combine(FolderPath, ReportName);
            ObjectDataSource objDataSource = new ObjectDataSource() { ID = DataSetName, TypeName = "BussinessLogic.Custom", SelectMethod = SelectedMethod};
            ReportParameter p1 = new ReportParameter("ReportParameter1", "1"); //I pass the same parameter name tha exist in report definition and it's value is on 1 as  static value for now

            this.ReportViewer1.LocalReport.SetParameters(new ReportParameter[] { p1});

            ReportDataSource datasource = new ReportDataSource(DataSetName, objDataSource);
            ReportViewer1.LocalReport.DataSources.Clear();
            ReportViewer1.LocalReport.DataSources.Add(datasource);

            #endregion

Answer 1

在将本地报表绑定到您的报表之前，应先执行对本地报表的所有数据访问。 如果可能，在源处进行过滤。

您需要添加到ObjectDataSource.SelectParameter集合。

string DataSetName = "DataSet1Parameter";
string SelectedMethod = "GetSomeEmployees";
string Parameter = "ID";

ObjectDataSource objDataSource = new ObjectDataSource() { ID = DataSetName, TypeName = "BussinessLogic.Custom", SelectMethod = SelectedMethod};
    objDataSource.SelectParameters.Add(new Parameter("id"));

然后订阅ObjectDataSource.Selecting事件以设置参数。

protected void objDataSource_Selecting
    (object sender, ObjectDataSourceSelectingEventArgs e)
{
    e.InputParameters["id"] = "1";
}