过滤ReportViewer数据？

问题描述

我试图按名称加载和筛选ReportViewer的按钮，但输出是未提供的数据源实例。这是我的代码：

private void btnReport_Click(object sender,EventArgs e)
        {
            String sql = "Select * from practise Where name ='" + textBox1.Text + "'";
            sqlConnection con = new sqlConnection(ConnectionString);
            sqlDataAdapter adp = new sqlDataAdapter(sql,con);
            DataSet ds = new DataSet();
            adp.Fill(ds);
            ReportDataSource rds = new ReportDataSource("practise",ds.Tables[0]);
            reportViewer2.ProcessingMode = ProcessingMode.Local;
            reportViewer2.LocalReport.ReportPath = "Report1.rdlc";
            if (ds.Tables[0].Rows.Count > 0)
            {
                reportViewer2.LocalReport.DataSources.Clear();
                reportViewer2.LocalReport.DataSources.Add(rds);
                reportViewer2.RefreshReport();
            }

解决方法

这可能很简单。请检查默认情况下报告中的数据集名称是否不是“ DataSet1”。另外，请确保报告路径正确。这是一个工作示例：

using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["DemoDB"].ConnectionString))
            {
                 String sql = "Select * from practise Where name ='" + textBox1.Text + "'";
                SqlDataAdapter adp = new SqlDataAdapter(sql,con);
                DataSet ds = new DataSet();
                adp.Fill(ds);
                ReportDataSource rds = new ReportDataSource("DataSet1",ds.Tables[0]);
                reportViewer2.ProcessingMode = ProcessingMode.Local;
              reportViewer2.LocalReport.ReportPath = "Report1.rdlc";
                if (ds.Tables[0].Rows.Count > 0)
                {
                    reportViewer2.LocalReport.DataSources.Clear();
                    reportViewer2.LocalReport.DataSources.Add(rds);
                    reportViewer2.RefreshReport();
                }
            }

我希望这会对某人有所帮助。