Question

我查看了很多现有问题，但我的问题仍然存在。

我在reportViewer1添加了MaisVendido.Form，并在应用中添加了Report3.rdlc，但此reportviewer没有显示任何内容。为什么会这样？

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.Reporting.WinForms;
using System.Collections;

namespace Fabrication
{
    public partial class MaisVendido : Form
    {
        DB db = new DB();
        DataSet ds = new DataSet();
        DataTable dt = new DataTable();
        public MaisVendido()
        {
            InitializeComponent();
            Getdataset();
            Getdatatable();
        }
        void Getdataset()
        {
            ds = db.ClientTable("select * from estoque");
        }
        void Getdatatable()
        {
            dt = db.Maisvendendo("select * from estoque");
        }
        private void MaisVendido_Load( object sender, EventArgs e )
        {
                reportViewer1.Visible = true;
                reportViewer1.LocalReport.ReportPath = "Report3.rdlc";
                ReportDataSource source = new ReportDataSource("Estoque", dt);
                reportViewer1.LocalReport.DataSources.Clear();
                reportViewer1.LocalReport.DataSources.Add(source);
                reportViewer1.LocalReport.Refresh();
        }
    }
}
//in my db class i have dataset and datatable two fucnitons
public DataSet ClientTable( string query )
        {
            DataSet dt = new DataSet();
            MySqlConnection con = new MySqlConnection(MysqlConnect());
            con.Open();

                MySqlCommand cmd = new MySqlCommand(query, con);
                MySqlDataAdapter ad = new MySqlDataAdapter(query, con);
                ad.Fill(dt);
                return dt;
        }
public DataTable Maisvendendo( String query )
        {
            DataTable dt = new DataTable();
            MySqlConnection con = new MySqlConnection(MysqlConnect());
            con.Open();

            MySqlDataAdapter ad = new MySqlDataAdapter(query, con);
            ad.Fill(dt);
            dt.TableName = "Estoque";
            con.Close();
            return dt;
        }

Answer 1

您应该使用ReportPath代替ReportEmbeddedResource，因为您没有使用嵌入式资源，而是使用本地文件。

来自Mysql数据集的Reportviewer绑定？

1 个答案: