Microsoft.Office.Interop.Excel.Application appexcel = new Microsoft.Office.Interop.Excel.Application();
SaveFileDialog savefiledialog = new SaveFileDialog();
System.Reflection.Missing miss = System.Reflection.Missing.Value;
appexcel = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook workbookdata;
Microsoft.Office.Interop.Excel.Worksheet worksheetdata;
Microsoft.Office.Interop.Excel.Range rangedata;
//设置对象不可见
appexcel.Visible = false;
System.Globalization.CultureInfo currentci = System.Threading.Thread.CurrentThread.CurrentCulture;
System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-us");
workbookdata = appexcel.Workbooks.Add(miss);
worksheetdata = (Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets.Add(miss, miss, miss, miss);
//给工作表赋名称
worksheetdata.Name = "saved";
for (int i = 0; i < dt.Columns.Count; i++)
{
worksheetdata.Cells[1, i + 1] = dt.Columns[i].ColumnName.ToString();
}
//因为第一行已经写了表头，所以所有数据都应该从a2开始
rangedata = worksheetdata.get_Range("a2", miss);
Microsoft.Office.Interop.Excel.Range xlrang = null;
//irowcount为实际行数，最大行
int irowcount = dt.Rows.Count;
int iparstedrow = 0, icurrsize = 0;
//ieachsize为每次写行的数值，可以自己设置
int ieachsize = 1000;
//icolumnaccount为实际列数，最大列数
int icolumnaccount = dt.Columns.Count;
//在内存中声明一个ieachsize×icolumnaccount的数组，ieachsize是每次最大存储的行数，icolumnaccount就是存储的实际列数
object[,] objval = new object[ieachsize, icolumnaccount];
icurrsize = ieachsize;
while (iparstedrow < irowcount)
{
if ((irowcount - iparstedrow) < ieachsize)
icurrsize = irowcount - iparstedrow;
//用for循环给数组赋值
for (int i = 0; i < icurrsize; i++)
{
for (int j = 0; j < icolumnaccount; j++)
objval[i, j] = dt.Rows[i + iparstedrow][j].ToString();
System.Windows.Forms.Application.DoEvents();
}
string X = "A" + ((int)(iparstedrow + 2)).ToString();
string col = "";
if (icolumnaccount <= 26)
{
col = ((char)('A' + icolumnaccount - 1)).ToString() + ((int)(iparstedrow + icurrsize + 1)).ToString();
}
else
{
col = ((char)('A' + (icolumnaccount / 26 - 1))).ToString() + ((char)('A' + (icolumnaccount % 26 - 1))).ToString() + ((int)(iparstedrow + icurrsize + 1)).ToString();
}
xlrang = worksheetdata.get_Range(X, col);
// 调用range的value2属性，把内存中的值赋给excel
xlrang.Value2 = objval;
iparstedrow = iparstedrow + icurrsize;
}
//保存工作表
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlrang);
xlrang = null;
//调用方法关闭excel进程
appexcel.Visible = true;
方法二：(自己建函数，适合大批量资料, 上万笔)
using System.IO;
private void dataTableToCsv(DataTable table, string file)
{
string title = "";
FileStream fs = new FileStream(file, FileMode.OpenOrCreate);
//FileStream fs1 = File.Open(file, FileMode.Open, FileAccess.Read);
StreamWriter sw = new StreamWriter(new BufferedStream(fs), System.Text.Encoding.Default);
for (int i = 0; i < table.Columns.Count; i++)
{
title += table.Columns[i].ColumnName + "\t"; //栏位：自动跳到下一单元格
}
title = title.Substring(0, title.Length - 1) + "\n";
sw.Write(title);
foreach (DataRow row in table.Rows)
{
string line = "";
for (int i = 0; i < table.Columns.Count; i++)
{
line += row[i].ToString().Trim() + "\t"; //内容：自动跳到下一单元格
}
line = line.Substring(0, line.Length - 1) + "\n";
sw.Write(line);
}
sw.Close();
fs.Close();
}
dataTableToCsv(dt, @"c:\1.xls"); //调用函数
System.Diagnostics.Process.Start(@"c:\1.xls"); //打开excel文件
方法三:(可以自己调整单元格的格式,适合小批量的数量)
try
{
//没有数据的话就不往下执行
if (dataGridView1.Rows.Count == 0)
return;
//实例化一个Excel.Application对象
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
//让后台执行设置为不可见，为true的话会看到打开一个Excel，然后数据在往里写
//excel.Visible = false;
excel.Visible = true;
//新增加一个工作簿，Workbook是直接保存，不会弹出保存对话框，加上Application会弹出保存对话框，值为false会报错
excel.Application.Workbooks.Add(true);
//生成Excel中列头名称
for (int i = 0; i < dataGridView1.Columns.Count; i++)
{
excel.Cells[1, i + 1] = dataGridView1.Columns[i].HeaderText;
}
//把DataGridView当前页的数据保存在Excel中
for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
{
for (int j = 0; j < dataGridView1.Columns.Count; j++)
{
if (dataGridView1[j, i].ValueType == typeof(string))
{
excel.Cells[i + 2, j + 1] = "'" + dataGridView1[j, i].Value.ToString();
}
else
{
excel.Cells[i + 2, j + 1] = dataGridView1[j, i].Value.ToString();
}
}
}
//设置禁止弹出保存和覆盖的询问提示框
excel.DisplayAlerts = false;
excel.AlertBeforeOverwriting = false;
////保存工作簿
//excel.Application.Workbooks.Add(true).Save();
////保存excel文件
//excel.Save("D:" + "\\KKHMD.xls");
////确保Excel进程关闭
//excel.Quit(); //可以直接打开文件
//excel = null;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "错误提示");
}
Excel.output((DataTable)dataGridView1.DataSource);