在网上找了一些代码，写的winform上写的一个导出Excel方法，带边框标题

#region 导出excel方法

public static void ExportTexcel(System.Data.DataTable dt)
{
System.Data.DataTable data = dt;
data.Columns.Add("特殊说明");
SaveFileDialog saveDlg = new SaveFileDialog();
saveDlg.Filter = "Execl files (*.xls)|*.xls";
saveDlg.FilterIndex = 0;
saveDlg.RestoreDirectory = true;
saveDlg.CreatePrompt = true;
saveDlg.Title = "导出文件保存路径";

saveDlg.FileName = "新建Excel文档";

if (DialogResult.OK == saveDlg.ShowDialog())
{
try
{

string strName = saveDlg.FileName;
if (strName.Length != 0)
{

System.Reflection.Missing miss = System.Reflection.Missing.Value;
Microsoft.Office.Interop.Excel.ApplicationClass excel = new Microsoft.Office.Interop.Excel.ApplicationClass();
excel.Application.Workbooks.Add(true); ;
excel.Visible = false;//若是true，则在导出的时候会显示EXcel界面。
if (excel == null)
{
MessageBox.Show("EXCEL无法启动！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
Microsoft.Office.Interop.Excel.Workbooks books = (Microsoft.Office.Interop.Excel.Workbooks)excel.Workbooks;
Microsoft.Office.Interop.Excel.Workbook book = (Microsoft.Office.Interop.Excel.Workbook)(books.Add(miss));
Microsoft.Office.Interop.Excel.Worksheet sheet = (Microsoft.Office.Interop.Excel.Worksheet)book.ActiveSheet;
sheet.Name = "质检报表";

int rowIndex = 4;
int colIndex = 0;
//取得列标题
foreach (DataColumn col in data.Columns)
{
colIndex++;
excel.Cells[4, colIndex] = col.ColumnName;

//设置标题格式为居中对齐
sheet.get_Range(excel.Cells[4, colIndex], excel.Cells[4, colIndex]).Font.Bold = true;
sheet.get_Range(excel.Cells[4, colIndex], excel.Cells[4, colIndex]).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;
sheet.get_Range(excel.Cells[4, colIndex], excel.Cells[4, colIndex]).Select();

//sheet.get_Range(excel.Cells[4, colIndex], excel.Cells[4, colIndex]).Interior.ColorIndex = 19;//19;//设置为浅黄色，共计有56种
}

//取得表格中的数据
foreach (DataRow row in data.Rows)
{
rowIndex++;
colIndex = 0;
foreach (DataColumn col in data.Columns)
{
colIndex++;
if (col.DataType == System.Type.GetType("System.DateTime"))
{
excel.Cells[rowIndex, colIndex] = (Convert.ToDateTime(row[col.ColumnName].ToString())).ToString("yyyy-MM-dd");
sheet.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;//设置日期型的字段格式为居中对齐
}
else
if (col.DataType == System.Type.GetType("System.String"))
{
excel.Cells[rowIndex, colIndex] = "'" + row[col.ColumnName].ToString();
sheet.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;//设置字符型的字段格式为居中对齐
}
else
{
excel.Cells[rowIndex, colIndex] = row[col.ColumnName].ToString();
}
}
}

int rowSum = rowIndex + 1;

//取得整个报表的标题
excel.Cells[2, 2] = "质检报表";
excel.Cells[3, 6] = "日期："+ DateTime.Now.ToString("yyyy年MM月dd日");
excel.Cells[rowIndex + 4, 1] = "哈尔滨xx通信软件开发有限公司";
excel.Cells[rowIndex + 5, 4] = "稽查人员：";
excel.Cells[rowIndex + 5, 5] = "________";
excel.Cells[rowIndex + 5, 6] = "负责人员：";
excel.Cells[rowIndex + 5, 7] = "________";

//设置整个报表的标题格式
sheet.get_Range(excel.Cells[2, 2], excel.Cells[2, 2]).Font.Bold = true;
sheet.get_Range(excel.Cells[2, 2], excel.Cells[2, 2]).Font.Size = 22;

//设置报表表格为最适应宽度
sheet.get_Range(excel.Cells[4, 2], excel.Cells[rowSum, colIndex]).Select();
sheet.get_Range(excel.Cells[4, 2], excel.Cells[rowSum, colIndex]).Columns.AutoFit();

//设置整个报表的标题为跨列居中
sheet.get_Range(excel.Cells[2, 2], excel.Cells[2, colIndex]).Select();
sheet.get_Range(excel.Cells[2, 2], excel.Cells[2, colIndex]).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenterAcrossSelection;

//绘制边框
sheet.get_Range(excel.Cells[4, 1], excel.Cells[rowSum, colIndex]).Borders.LineStyle = 1;
sheet.get_Range(excel.Cells[4, 1], excel.Cells[rowSum, 1]).Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeLeft].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;//设置左边线
sheet.get_Range(excel.Cells[4, 1], excel.Cells[4, colIndex]).Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeTop].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;//设置上边线
sheet.get_Range(excel.Cells[4, colIndex], excel.Cells[rowSum, colIndex]).Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeRight].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;//设置右边线
sheet.get_Range(excel.Cells[rowSum, 1], excel.Cells[rowSum, colIndex]).Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeBottom].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;//设置下边线

sheet.SaveAs(strName, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);
book.Close(false, miss, miss);
books.Close();
excel.Quit();

System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
System.Runtime.InteropServices.Marshal.ReleaseComObject(book);
System.Runtime.InteropServices.Marshal.ReleaseComObject(books);
System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);

GC.Collect();
MessageBox.Show("数据已经成功导出到：" + saveDlg.FileName.ToString(), "导出完成", MessageBoxButtons.OK, MessageBoxIcon.Information);
//toolStripProgressBar1.Value = 0;
//toolStripProgressBar1.Visible = false;
}
}

catch (Exception ex)
{
MessageBox.Show(ex.Message, "", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}

#endregion