zoukankan      html  css  js  c++  java
  • c#语言报表和图表。

    打印报表操作步骤:

    1 创建dataset数据集

    2 创建rdlc报表文件

    3 在窗体中创建reportviewer视图,指定具体数据源

    4 给dataset里的datatablede 的对象进行赋值。

    参考代码:

     private void Form1_Load(object sender, EventArgs e)

            {

              //连接数据库

                SqlConnection coon = new SqlConnection("server=.;database=master;user=sa;pwd=123");

                SqlCommand cmd = coon.CreateCommand();

                coon.Open();  

               cmd.CommandText = "select*from student ,score where student.sno=score.sno";

                SqlDataReader dr = cmd.ExecuteReader();   

              if (dr.HasRows)

                {

                    while (dr.Read ())

                    {  

                     //给dataset里的datatable赋值

                        DataRow row = DataSet1.lianjiebiao.NewRow();  

                        row["sno"]=dr["sno"];

                        row["ssex"] = dr["ssex"];

                        row["sname"] = dr["sname"];

                        row["sbirthdy"] = dr["sbirthdy"];

                        row["class"] = dr["class"];

                        row["cno"] = dr["cno"];

                        row["degree"] = dr["degree"];

                        DataSet1.lianjiebiao.Rows.Add(row);    //row为行集合

                   }  

               }  

               coon.Close();   

              this.reportViewer1.RefreshReport();

            }

          图表:柱状图,把数据库查出来的数据集放在一个泛型集合里,然后把这个泛型集作为参数赋给柱状图。参考代码如下:

     public partial class Form1 : Form

        {

            private DataClasses1DataContext Context;  //LINQ to SQL类,连接数据库查询

            public Form1()

            {

                InitializeComponent();

                Context = new DataClasses1DataContext();

            }

            private void Form1_Load(object sender, EventArgs e)  

           {

               //car为表名,take(5)只显示其中五列

                List<Car> list = Context.Car.Take(5).ToList();

                //为图表指定数据源

                chart1.DataSource = list;

                chart1.Series["Series1"].XValueMember = "Name";

                chart1.Series["Series1"].YValueMembers = "Oil";

                chart1.Series["Series2"].XValueMember = "Name";

                chart1.Series["Series2"].YValueMembers = "powers";

                //下面是线状图显示

                chart1.Series["Series2"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.FastLine;

            }    

    }

        

            private void Form1_Load(object sender, EventArgs e)         {             List<Car> list = Context.Car.Take(5).ToList();             //为图表指定数据源             chart1.DataSource = list;             chart1.Series["Series1"].XValueMember = "Name";             chart1.Series["Series1"].YValueMembers = "Oil";             chart1.Series["Series2"].XValueMember = "Name";             chart1.Series["Series2"].YValueMembers = "powers";             //下面是线状图显示             chart1.Series["Series2"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.FastLine;         }     } }

  • 相关阅读:
    合理配置SQL Server的最大内存
    理解内存----优化SQL Server内存配置
    Systems Performance: Enterprise and the Cloud 读书笔记系列
    google perftools分析程序性能
    源代码分析-构建调用图
    Intel VTune性能分析器基础
    代微机原理与接口技术(第3版)课程配套实验包和电子课件
    【MySQL性能优化】MySQL常见SQL错误用法
    Linux 内核分析 -- Linux内核学习总结
    《Linux就该这么学》 软件库
  • 原文地址:https://www.cnblogs.com/275147378abc/p/4597340.html
Copyright © 2011-2022 走看看