C# 过滤ReportViewer数据?
我正试图创建一个按钮来按名称加载和过滤我的ReportViewer,但输出是未提供的数据源实例。这是我的密码:C# 过滤ReportViewer数据?,c#,mysql,reportviewer,C#,Mysql,Reportviewer,我正试图创建一个按钮来按名称加载和过滤我的ReportViewer,但输出是未提供的数据源实例。这是我的密码: private void btnReport_Click(object sender, EventArgs e) { String sql = "Select * from practise Where name ='" + textBox1.Text + "'"; SqlConne
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();
}
这可能很简单。请检查报告中的数据集名称是否默认为“DataSet1”。此外,请确保报告的路径正确。以下是一个工作示例:
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();
}
}
我希望这能帮助别人