private void button3_Click(object sender, EventArgs e)
{
ExportTasks(Bind(), dataGridView1);
}
//如果 Excel 安装在计算机上,侧导出表格内容到 Excel
public void ExportTasks(DataSet TasksData, DataGridView TasksGridView)
{
// 定义要使用的Excel 组件接口
// 定义Application 对象,此对象表示整个Excel 程序
Microsoft.Office.Interop.Excel.Application excelApp = null ;
// 定义Workbook对象,此对象代表工作薄
Microsoft.Office.Interop.Excel.Workbook workBook;
// 定义Worksheet 对象,此对象表示Execel 中的一张工作表
Microsoft.Office.Interop.Excel.Worksheet ws=null;
//定义Range对象,此对象代表单元格区域
Microsoft.Office.Interop.Excel.Range r;

int row = 1; int cell = 1;
try
{
//初始化 Application 对象 excelApp
excelApp = new Microsoft.Office.Interop.Excel.Application();
//在工作薄的第一个工作表上创建任务列表
workBook = excelApp.Workbooks.Add(XlWBATemplate.xlWBATWorksheet);

ws =(Worksheet)workBook.Worksheets[1];

// 命名工作表的名称为 "Task Management"
ws.Name = "Task Management";

#region 创建表格的列头
// 遍历数据表中的所有列
foreach (DataGridViewColumn cs in TasksGridView.Columns)
{
// 假如并不想把主键也显示出来
if (cs.HeaderText != "编号")
{
ws.Cells[row, cell] = cs.HeaderText;
r = (Range)ws.Cells[row, cell];

ws.get_Range(r, r).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;

//此处用来设置列的样式
cell++;
}
}

// 创建行,把数据视图记录输出到对应的Excel 单元格
for (int i = 2; i < TasksData.Tables[0].Rows.Count; i++)
{
for (int j = 1; j < TasksData.Tables[0].Columns.Count; j++)
{

ws.Cells[i, j] = TasksData.Tables[0].Rows[i][j].ToString();
// r = (Range)ws.Cells[i,j];

Range rg = (Range)ws.get_Range(ws.Cells[i, j], ws.Cells[i, j]);
rg.EntireColumn.ColumnWidth = 20;
// rg.Columns.AutoFit();
rg.NumberFormatLocal = "@";
}

}
#endregion
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}

//显示 Excel
excelApp.Visible = true;

}

private void button5_Click(object sender, EventArgs e)
{
DataSet ds = Bind();
dataGridView1.DataSource = ds.Tables[0];
}
private DataSet Bind()
{
SqlConnection conn = new SqlConnection("Server=.;Database=testManage;Integrated Security=SSPI");
SqlDataAdapter da = new SqlDataAdapter("select FNumber,FExamNum,FName,FSex,FJobAdd,FCardID,FBirDate from stuInfo", conn);
DataSet ds = new DataSet();
da.Fill(ds);
return ds;
}
private void button2_Click(object sender, EventArgs e)
{
SaveFileDialog sfd = new SaveFileDialog();
sfd.Title = "请选择将导出的EXCEL文件存放路径";
sfd.FileName = System.DateTime.Now.ToShortDateString() + "-学生信息";
sfd.Filter = "Excel文档(*.xls)|*.xls";
sfd.ShowDialog();

if (sfd.FileName != "")
{

Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.Application();
if (excelApp == null)
{
MessageBox.Show("无法创建Excel对象，可能您的机器未安装Excel");
}
else
{
Microsoft.Office.Interop.Excel.Workbooks workbooks = excelApp.Workbooks;
Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);
Microsoft.Office.Interop.Excel.Worksheet worksheet =(Worksheet) workbook.Worksheets[1];
DataSet ds=Bind();
for (int i = 1; i < ds.Tables[0].Rows.Count; i++)
{
for (int j = 1; j < ds.Tables[0].Columns.Count;j++ )
{
if (i == 1)
{
worksheet.Cells[i, j] = dataGridView1.Columns[j].HeaderText;

}
worksheet.Cells[i+1, j] = ds.Tables[0].Rows[i][j].ToString();
}
}