c# dataGridView中的所有数据导出到EXCEL文件中

2024-11-13 04:16:25
推荐回答(1个)
回答(1):

 excel导出在C#代码中应用己经很广泛了,我这里就做些总结,供自己和读者学习用。

Excel知识点。  
一、添加引用和命名空间 
添加Microsoft.Office.Interop.Excel引用,它的默认路径是C:\Program Files\Microsoft Visual Studio 9.0\Visual Studio Tools for Office\PIA\Office12\Microsoft.Office.Interop.Excel.dll 
代码中添加引用using Microsoft.Office.Interop.Excel; 
二、Excel类的简单介绍 
此命名空间下关于Excel类的结构分别为: 
ApplicationClass - 就是我们的excel应用程序。 
Workbook - 就是我们平常见的一个个excel文件,经常是使用Workbooks类对其进行操作。 
Worksheet - 就是excel文件中的一个个sheet页。 
Worksheet.Cells[row, column] - 就是某行某列的单元格,注意这里的下标row和column都是从1开始的,袭睁跟我平常用的数组或集合的下标有所不同。 
知道了上述基本知识后,利用此类来操作excel就清晰了很多。 
三、Excel的操作 
任何操作Excel的动作首先肯定是用excel应用程序,首先要new一个ApplicationClass 实例,并在最后将厅森此实例释放。 

ApplicationClass xlsApp = new ApplicationClass(); // 1. 创建Excel应用程序对象的一个实例,相当于我们从开始菜单打开Excel应用程序。

if (xlsApp == null)

{

//对此实例进行验证,如果为null则表示运行扮禅亩此代码的机器可能未安装Excel

}

   


1. 打开现有的Excel文件 

   
Workbook workbook = xlsApp.Workbooks.Open(excelFilePath, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
Worksheet mySheet = workbook.Sheets[1] as Worksheet; //第一个sheet页
mySheet.Name = "testsheet"; //这里修改sheet名称
   


2.复制sheet页 

1
   
mySheet.Copy(Type.Missing, workbook.Sheets[1]); //复制mySheet成一个新的sheet页,复制完后的名称是mySheet页名称后加一个(2),这里就是testsheet(2),复制完后,Worksheet的数量增加一个
   


注意 这里Copy方法的两个参数,指是的复制出来新的sheet页是在指定sheet页的前面还是后面,上面的例子就是指复制的sheet页在第一个sheet页的后面。 
3.删除sheet页 

1
2
   
xlsApp.DisplayAlerts = false; //如果想删除某个sheet页,zjjzdq.com.cn首先要将此项设为fasle。
(xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Delete();
   


4.选中sheet页 

1
   
(xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Select(Type.Missing); //选中某个sheet页
   


5.另存excel文件    
workbook.Saved = true;
workbook.SaveCopyAs(filepath);
   


6.释放excel资源 


   
workbook.Close(true, Type.Missing, Type.Missing);
workbook = null;
xlsApp.Quit();
xlsApp = null;
   

 
 
一般的我们传入一个DataTable生成Excel代码


   
/// 
///zjjzdq.com.cn
/// 

/// 
protected void ExportExcel(DataTable dt)
{
    if (dt == null||dt.Rows.Count==0) return;
    Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
 
    if (xlApp == null)
    {
        return;
    }
    System.Globalization.CultureInfo CurrentCI = System.Threading.Thread.CurrentThread.CurrentCulture;
    System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");
    Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
    Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
    Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];
    Microsoft.Office.Interop.Excel.Range range;
    long totalCount = dt.Rows.Count;
    long rowRead = 0;
    float percent = 0;
    for (int i = 0; i < dt.Columns.Count; i++)
    {
        worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
        range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1];
        range.Interior.ColorIndex = 15;
        range.Font.Bold = true;
    }
    for (int r = 0; r < dt.Rows.Count; r++)
    {
        for (int i = 0; i < dt.Columns.Count; i++)
        {
            worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i].ToString();
        }
        rowRead++;
        percent = ((float)(100 * rowRead)) / totalCount;
    }
    xlApp.Visible = true;
}
   

 
 
如果要在excel中插入图片,我们需要把代码加入一行即可,如下所示


   
protected void ExportExcel(DataTable dt)
{
    if (dt == null || dt.Rows.Count == 0) return;
    Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
 
    if (xlApp == null)
    {
        return;
    }
    System.Globalization.CultureInfo CurrentCI = System.Threading.Thread.CurrentThread.CurrentCulture;
    System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");
    Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
    Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
    Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];
    Microsoft.Office.Interop.Excel.Range range;
    long totalCount = dt.Rows.Count;
    long rowRead = 0;
    float percent = 0;
    for (int i = 0; i < dt.Columns.Count; i++)
    {
        worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
        range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1];
        range.Interior.ColorIndex = 15;
    }
    for (int r = 0; r < dt.Rows.Count; r++)
    {
        for (int i = 0; i < dt.Columns.Count; i++)
        {
            try
            {
                worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i].ToString();
            }
            catch
            {
                worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i].ToString().Replace("=", "");
            }
        }
        rowRead++;
        percent = ((float)(100 * rowRead)) / totalCount;
    }
     
    worksheet.Shapes.AddPicture("C:\\Users\\spring\\Desktop\\1.gif", Microsoft.Office.Core.MsoTriState.msoFalse, Microsoft.Office.Core.MsoTriState.msoCTrue, 100, 200, 200, 300);
    worksheet.Shapes.AddTextEffect(Microsoft.Office.Core.MsoPresetTextEffect.msoTextEffect1, "123456", "Red", 15, Microsoft.Office.Core.MsoTriState.msoFalse, Microsoft.Office.Core.MsoTriState.msoTrue, 150, 200);
    xlApp.Visible = true;
}
   

 
 
我们调用如下:


   
public void GenerateExcel()
{
    DataTable dt = new DataTable();
    dt.Columns.Add("Name", typeof(string));
    dt.Columns.Add("Age", typeof(string));
    DataRow dr = dt.NewRow();
    dr["Name"] = "spring";
    dr["Age"] = "20";
    dt.Rows.Add(dr);
    dt.AcceptChanges();
    ExportExcel(dt);
}

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