c#调用Excel绘制图表

c#调用Excel需要引用命名空间

using Microsoft.Office.Interop.Excel;

由于该程序不复杂，主要是根据不同数据画表和图，画的图像也并不复杂，因为画图和画表的操作会重复使用，所以，我把画表和图的操作放在一个类中

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Office.Interop.Excel;
namespace Excel
{
    class SheetControl
    {
        Worksheet sheet;
        public SheetControl(Worksheet sheet)
        {
            this.sheet = sheet;
        }

        /// <summary>
        /// 根据条件绘制图表
        /// </summary>
        /// <param name="rg">绘制图表的区域</param>
        /// <param name="data">数据区域</param>
        /// <param name="type">图表类型，XlChartType枚举类型</param>
        /// <param name="xlrc">设置以行或者列为系列，XlRowCol枚举类型</param>
        /// <param name="title">表格标题</param>
        /// <param name="CategoryTitle">表格分类坐标名称，即横坐标名称</param>
        /// <param name="ValueTitle">表格数据坐标的名称，即纵坐标名称</param>
        public void CreateChart(Range rg, Range data, Object type = null, XlRowCol xlrc = XlRowCol.xlColumns, string title = null, string CategoryTitle = null, string ValueTitle = null)
        {
            ChartObjects charts = (ChartObjects)sheet.ChartObjects(Type.Missing);
            ChartObject chartObj = charts.Add(rg.Left, rg.Top, rg.Width, rg.Height);
            Chart chart = chartObj.Chart;
            chart.ChartWizard(data, type, Type.Missing, xlrc, 1, 1, true, title, CategoryTitle, ValueTitle, Type.Missing);
            chart.Legend.Position = XlLegendPosition.xlLegendPositionTop;
            
        }

        /// <summary>
        /// 根据参数创建表格
        /// </summary>
        /// <param name="title">表格第一个单元格内容</param>
        /// <param name="rows">行标题，每行的首个单元格内容</param>
        /// <param name="cols">列标题，没列的首个单元格</param>
        /// <param name="data">表格数据</param>
        /// <param name="startRow">行开始位置</param>
        /// <param name="startCol">列开始位置</param>
        public void CreateTable(string title,string[] rows,string[] cols,string[,] data,int startRow,int startCol)
        {
            sheet.Cells[startRow, startCol] = title;
            for (int i = 0; i < cols.Length; i++)
            {
                sheet.Cells[startRow, i + startCol + 1] = cols[i];
            }
            for (int i = 0; i < rows.Length; i++)
            { 
                sheet.Cells[i+startRow+1,startCol]=rows[i];
                for (int j = 0; j < cols.Length; j++)
                {
                    sheet.Cells[i + startRow + 1, j + startCol + 1] = data[i, j];
                }
            }  
        }
        /// <summary>
        /// 设置表格的信息，包括边框，文字等
        /// </summary>
        public void SetType()
        {
            
            sheet.UsedRange.Font.Size = 12;
            sheet.UsedRange.Font.Name = "华文楷体";
            sheet.UsedRange.HorizontalAlignment = XlHAlign.xlHAlignCenter;//竖直居中
            sheet.UsedRange.VerticalAlignment = XlVAlign.xlVAlignCenter;//水平居中
            sheet.UsedRange.Borders.LineStyle = 1;//边框
            sheet.UsedRange.Columns.AutoFit();//列宽自适应
            sheet.UsedRange.Rows.AutoFit();//行高自适应
            //设置边框
            sheet.UsedRange.BorderAround(XlLineStyle.xlDouble, XlBorderWeight.xlThick, XlColorIndex.xlColorIndexAutomatic, System.Drawing.Color.Black.ToArgb());
        }
    }
}

设置一个Excel全局变量

public Microsoft.Office.Interop.Excel.Application myexcel;

设置数据并新建一个Excel画表和图

private void button1_Click(object sender, EventArgs e)
        {
            string[] rows = { "国家机关办公建筑","办公建筑","商场建筑","宾馆饭店建筑","文化建筑","医疗卫生建筑","体育建筑","综合建筑","教育建筑","其他建筑","总计"};
            string[] cols = { "本月","上月" };
            string[,] data ={{"3","5"},
                            {"0","66"},
                            {"1","36"},
                            {"2","27"},
                            {"0","7"},
                            {"2","2"},
                            {"0","2"},
                            {"0","29"},
                            {"0","2"},
                            {"0","2"},
                            {"8","178"}};

            DialogResult res = MessageBox.Show("是否生成 新的Excel ?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);
            if (res == DialogResult.Yes)
            {

                myexcel = new Microsoft.Office.Interop.Excel.Application();
                myexcel.Application.Workbooks.Add(Type.Missing);
                myexcel.Caption = "excel test";
                myexcel.Visible = true;
                Worksheet sheet = (Worksheet)myexcel.ActiveWorkbook.Worksheets.Add(Missing.Value, Missing.Value, Missing.Value, Missing.Value);
                sheet.Name = "表2";
                SheetControl sc = new SheetControl(sheet);
                sc.CreateChart(sheet.get_Range("F2:O12"), sheet.get_Range((Range)sheet.Cells[2, 2], (Range)sheet.Cells[2 + rows.Length - 1, 2 + cols.Length]), XlChartType.xlColumnClustered, XlRowCol.xlColumns, "本月建筑能耗监测情况", null, "月度单位面积电耗");
                //sheet.get_Range(sheet.Cells[2,2],sheet.Cells[2+rows.Length,2+cols.Length])
                sc.CreateTable("建筑类型", rows, cols, data, 2, 2);
                sc.SetType();
            }
        }

在创建一个Excel对象的时候是用

Microsoft.Office.Interop.Excel.Application myexcel = new Microsoft.Office.Interop.Excel.Application();

也可以用ApplicationClass来创建
其中Application和ApplicationClass的联系和区别
代码中使用Application接口，实际在初始化实例时，系统使用Application Class类来初始化Application对象。

Worksheets.Add方法介绍：
Worksheets 对象的 Add 方法：新建工作表、图表或宏表。新建的工作表将成为活动工作表。语法是：expression.Add(Before, After, Count, Type)

expression ： 必需。该表达式返回上面的对象之一。

Before ： Variant 类型，可选。指定工作表对象，新建的工作表将置于此工作表之前。

After ： Variant 类型，可选。指定工作表对象，新建的工作表将置于此工作表之后。

Count ： Variant 类型，可选。要新建的工作表的数目。默认值为 1。

Type ： Variant 类型，可选。指定工作表类型。