在C#中利用Excel做高级报表

下面进行高级报表设计,该方法的原理为:首先打开Excel,按照要求排好版,保存为一个文件做为模板,然后在C#中将该文件复制为一个新文件,在指定位置填入数据就可以了,为了添加表格线,我们录制了一个宏,在C#中执行该宏即可。

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

 

using System.IO;

using System.Reflection;

 

namespace MyExcel

{

     /// <summary>

     /// Form1 的摘要说明。

     /// </summary>

     public class Form1 : System.Windows.Forms.Form

     {

         private System.Windows.Forms.Button btnNormal;

         private System.Windows.Forms.Button btnAdvace;

         /// <summary>

         /// 必需的设计器变量。

         /// </summary>

         private System.ComponentModel.Container components = null;

 

         public Form1()

         {

              //

              // Windows 窗体设计器支持所必需的

              //

              InitializeComponent();

 

              //

              // TODO: 在 InitializeComponent 调用后添加任何构造函数代码

              //

         }

 

         /// <summary>

         /// 清理所有正在使用的资源。

         /// </summary>

         protected override void Dispose( bool disposing )

         {

              if( disposing )

              {

                   if (components != null)

                   {

                       components.Dispose();

                   }

              }

              base.Dispose( disposing );

         }

 

         #region Windows Form Designer generated code

         /// <summary>

         /// 设计器支持所需的方法 - 不要使用代码编辑器修改

         /// 此方法的内容。

         /// </summary>

         private void InitializeComponent()

         {

              this.btnNormal = new System.Windows.Forms.Button();

              this.btnAdvace = new System.Windows.Forms.Button();

              this.SuspendLayout();

              //

              // btnNormal

              //

              this.btnNormal.Location = new System.Drawing.Point(49, 55);

              this.btnNormal.Name = "btnNormal";

              this.btnNormal.TabIndex = 0;

              this.btnNormal.Text = "普通报表";

              this.btnNormal.Click += new System.EventHandler(this.btnNormal_Click);

              //

              // btnAdvace

              //

              this.btnAdvace.Location = new System.Drawing.Point(169, 55);

              this.btnAdvace.Name = "btnAdvace";

              this.btnAdvace.TabIndex = 1;

              this.btnAdvace.Text = "高级报表";

              this.btnAdvace.Click += new System.EventHandler(this.btnAdvace_Click);

              //

              // Form1

              //

              this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

              this.ClientSize = new System.Drawing.Size(292, 133);

              this.Controls.AddRange(new System.Windows.Forms.Control[] {

                                                                                      this.btnAdvace,

                                                                                      this.btnNormal});

              this.Name = "Form1";

              this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;

              this.Text = "Form1";

              this.ResumeLayout(false);

 

         }

         #endregion

 

         /// <summary>

         /// 应用程序的主入口点。

         /// </summary>

         [STAThread]

         static void Main()

         {

              Application.Run(new Form1());

         }

 

         private string [,] myData=

         {

              {"车牌号","类 型","品 牌","型 号","颜 色","附加费证号","车架号"},

              {"JAJAJS","危险品","货车","铁风SZG9220YY","白","323232","323232"},

                     };

 

          //普通报表,即单纯的文件导出功能

         private void btnNormal_Click(object sender, System.EventArgs e)

         {

              //创建一个Excel文件

              Excel.Application myExcel = new Excel.Application ( ) ;

              myExcel.Application.Workbooks.Add ( true ) ;

              //让Excel文件可见

              myExcel.Visible=true;

              //第一行为报表名称

              myExcel.Cells[1,4]="普通报表";

              //逐行写入数据,

              for(int i=0;i<11;i++)

              {

                   for(int j=0;j<7;j++)

                   {

                       //以单引号开头,表示该单元格为纯文本

                       myExcel.Cells[2+i,1+j]="'"+myData[i,j];

                   }

              }

 

         }

         //高级报表,根据模板生成的报表

         private void btnAdvace_Click(object sender, System.EventArgs e)

         {

              string filename="";

              //将模板文件复制到一个新文件中

              SaveFileDialog mySave=new SaveFileDialog();

              mySave.Filter="Excel文件(*.XLS)|*.xls|所有文件(*.*)|*.*";

              if(mySave.ShowDialog()!=DialogResult.OK)

              {

                   return;

              }

              else

              {

                   filename=mySave.FileName;

                   //将模板文件copy到新位置,建议实际开发时用相对路径,如Application.StartupPath.Trim()+"\\report\\normal.xls"

                  

                   string filenameold=mySave.FileName;

                   FileInfo mode=new FileInfo("d:\\normal.xls");

                   try

                   {

                       mode.CopyTo(filename,true);

                   }

                   catch(Exception ee)

                   {

                       MessageBox.Show(ee.Message);

                       return;

                   }

 

              }

 

              //打开复制后的文件

              object missing=Missing.Value;

              Excel.Application myExcel=new Excel.Application ( );

              //打开新文件

              myExcel.Application.Workbooks.Open(filename,

                   missing,

                   missing,

                   missing,

                   missing,

                   missing,

                   missing,

                   missing,

                   missing,

                   missing,

                   missing,

                   missing,

                   missing);

              //将Excel显示出来

              myExcel.Visible=true;

 

              //逐行写入数据,数组中第一行我列标题,忽略

              for(int i=1;i<11;i++)

              {

                   for(int j=0;j<7;j++)

                   {

                       //以单引号开头,表示该单元格为纯文本

                       myExcel.Cells[4+i,1+j]="'"+myData[i,j];

                   }

              }

             

 

              //将列标题和实际内容选中

              Excel.Workbook myBook=myExcel.Workbooks[1];

              Excel.Worksheet mySheet=(Excel.Worksheet)myBook.Worksheets[1];

              Excel.Range r=mySheet.get_Range(mySheet.Cells[3,1],mySheet.Cells[14,7]);

              r.Select();

              //=====通过执行宏来格表格加边框=======//

              try

              {

                   myExcel.Run("宏1",missing,missing,

 

                       missing,missing,missing,missing,missing,missing,missing,

 

                       missing,missing,missing,missing,missing,missing,missing,

 

                       missing,missing,missing,missing,missing,missing,missing,

 

                       missing,missing,missing,missing,missing,missing,missing);

              }

              catch

              {

              }

              //保存修改

              myBook.Save();

         }

    

     }//end of form

}

在上述代码中,我们指定了选定范围:

Excel.Range r=mySheet.get_Range(mySheet.Cells[3,1],mySheet.Cells[14,7]);

具体开发时,我们可以根据数据库中的实际数据来计算范围,我们的列标题是从.Cells[3,1]开始的,在程序中定死了,为灵活使用,我们完全可以在模板的Cells[1,1]或者其他单元格填入一些基本信息,如实际数据起始位置等等,操作时,从该单元格读入数据,然后将该单元格内容替换成需要的内容。还有个问题,我们往单元格中写内容时假设某列应该放什么内容,为灵活起见,我们在得到了列标题起始位置后,读入该单元格内容(即该列应该是什么字段),再从数据库中找到相应的字段来填充该列,可以保证所填内容与设计的报表对应起来,还可以忽略数据库中无用的字段,也就是说同一个数据库表可以有许多种报表,只要有相应的模板就可以了,读入某单元格内容的代码如下:

     Excel.Range r;

     r=mySheet.get_Range(mySheet.Cells[2,1],mySheet.Cells[2,1]);  //取得值存放的区域

     string strValue=r.Value.ToString();

一次只能读一个单元格,否则得不到相应的数据,即=mySheet.get_Range(mySheet.Cells[2,1],mySheet.Cells[2,1])中两个参数都必须是同一个单元格,本例中为mySheet.Cells[2,1]。

posted @ 2010-11-18 13:08  落冰  阅读(528)  评论(0编辑  收藏  举报