WinForm中DataGridView数据导入Excel

using System.IO;

using System.Reflection;

using System.Runtime.InteropServices;

using Microsoft.Office.Interop.Excel;

public class DataGridViewToExcel

{

/// <summary>

/// 打开Excel并将DataGridView控件中数据导出到Excel

/// </summary>

/// <param name="dgv">DataGridView对象 </param>

/// <param name="isShowExcle">是否显示Excel界面 </param>

/// <remarks>

/// add com "Microsoft Excel 11.0 Object Library"

/// using Excel=Microsoft.Office.Interop.Excel;

/// </remarks>

/// <returns> </returns>

public static bool DataGridviewShowToExcel(DataGridView dgv, bool isShowExcle)

{

//申明保存对话框

SaveFileDialog dlg = new SaveFileDialog();

//默然文件后缀

dlg.DefaultExt = "xls ";

//文件后缀列表

dlg.Filter = "EXCEL文件(*.xls)|*.xls ";

//默然路径是系统当前路径

dlg.InitialDirectory = Directory.GetCurrentDirectory();

//打开保存对话框

if (dlg.ShowDialog() == DialogResult.Cancel) return false;

//返回文件路径

string fileNameString = dlg.FileName;

if (dgv.Rows.Count == 0)

return false;

//建立Excel对象

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

Excel.Workbook xBook = excel.Application.Workbooks.Add(true);

excel.Visible = isShowExcle;

//生成字段名称

for (int i = 0; i < dgv.ColumnCount; i++)

{

excel.Cells[1, i + 1] = dgv.Columns[i].HeaderText;

}

//填充数据

for (int i = 0; i < dgv.RowCount - 1; i++)

{

for (int j = 0; j < dgv.ColumnCount; j++)

{

if (dgv[j, i].ValueType == typeof(string))

{

excel.Cells[i + 2, j + 1] = "'" + dgv[j, i].Value.ToString();

}

else

{

excel.Cells[i + 2, j + 1] = dgv[j, i].Value.ToString();

}

}

}

FileInfo file = new FileInfo(fileNameString);

if (file.Exists)

{

try

{

file.Delete();

}

catch (Exception error)

{

MessageBox.Show(error.Message, "删除失败 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);

return false;

}

}

xBook.SaveAs(fileNameString, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

MessageBox.Show(fileNameString + "\n\n导出完毕! ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

PublicMethod.Kill(excel);

return true;

}

#region DataGridView导出到Excel，有一定的判断性,对数据格式化

/// <summary>

///方法，导出DataGridView中的数据到Excel文件

/// </summary>

/// <remarks>

/// add com "Microsoft Excel 11.0 Object Library"

/// using Excel=Microsoft.Office.Interop.Excel;

/// using System.Reflection;

/// </remarks>

/// <param name= "dgv"> DataGridView </param>

public static void ToExcelWithOpen(DataGridView dgv)

{

#region 验证可操作性

//申明保存对话框

SaveFileDialog dlg = new SaveFileDialog();

//默然文件后缀

dlg.DefaultExt = "xls ";

//文件后缀列表

dlg.Filter = "EXCEL文件(*.xls)|*.xls ";

//默然路径是系统当前路径

dlg.InitialDirectory = Directory.GetCurrentDirectory();

//打开保存对话框

if (dlg.ShowDialog() == DialogResult.Cancel) return;

//返回文件路径

string fileNameString = dlg.FileName;

//验证strFileName是否为空或值无效

if (fileNameString.Trim() == " ")

{ return; }

//定义表格内数据的行数和列数

int rowscount = dgv.Rows.Count;

int colscount = dgv.Columns.Count;

//行数必须大于0

if (rowscount <= 0)

{

MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

//列数必须大于0

if (colscount <= 0)

{

MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

//行数不可以大于65536

if (rowscount > 65536)

{

MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

//列数不可以大于255

if (colscount > 255)

{

MessageBox.Show("数据记录行数太多，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

//验证以fileNameString命名的文件是否存在，如果存在删除它

FileInfo file = new FileInfo(fileNameString);

if (file.Exists)

{

try

{

file.Delete();

}

catch (Exception error)

{

MessageBox.Show(error.Message, "删除失败 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);

return;

}

}

#endregion

Excel.Application objExcel = null;

Excel.Workbook objWorkbook = null;

Excel.Worksheet objsheet = null;

try

{

//申明对象

objExcel = new Excel.Application();

objWorkbook = objExcel.Workbooks.Add(Missing.Value);

objsheet = (Excel.Worksheet)objWorkbook.ActiveSheet;

//设置EXCEL不可见

objExcel.Visible = false;

//向Excel中写入表格的表头

int displayColumnsCount = 1;

for (int i = 0; i <= dgv.ColumnCount - 1; i++)

{

if (dgv.Columns[i].Visible == true)

{

objExcel.Cells[1, displayColumnsCount] = dgv.Columns[i].HeaderText.Trim();

displayColumnsCount++;

}

}

//设置进度条

//tempProgressBar.Refresh();

//tempProgressBar.Visible = true;

//tempProgressBar.Minimum=1;

//tempProgressBar.Maximum=dgv.RowCount;

//tempProgressBar.Step=1;

//向Excel中逐行逐列写入表格中的数据

for (int row = 0; row <= dgv.RowCount - 1; row++)

{

//tempProgressBar.PerformStep();

displayColumnsCount = 1;

for (int col = 0; col < colscount; col++)

{

if (dgv.Columns[col].Visible == true)

{

try

{

objExcel.Cells[row + 2, displayColumnsCount] = dgv.Rows[row].Cells[col].Value.ToString().Trim();

displayColumnsCount++;

}

catch (Exception)

{

}

}

}

}

//隐藏进度条

//tempProgressBar.Visible = false;

//保存文件

objWorkbook.SaveAs(fileNameString, Missing.Value, Missing.Value, Missing.Value, Missing.Value,

Missing.Value, Excel.XlSaveAsAccessMode.xlShared, Missing.Value, Missing.Value, Missing.Value,

Missing.Value, Missing.Value);

}

catch (Exception error)

{

MessageBox.Show(error.Message, "警告 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);

return;

}

finally

{

//关闭Excel应用

if (objWorkbook != null) objWorkbook.Close(Missing.Value, Missing.Value, Missing.Value);

if (objExcel.Workbooks != null) objExcel.Workbooks.Close();

if (objExcel != null) objExcel.Quit();

objsheet = null;

objWorkbook = null;

objExcel = null;

}

MessageBox.Show(fileNameString + "\n\n导出完毕! ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

PublicMethod.Kill(excel);

}

#endregion

}

引用Microsoft.Office.Interop.Excel.dll，这个动态链接库可以在http://download.csdn.net/source/2379128下载

上面PublicMethod是用来关闭Excel进程的，代码如下

public class PublicMethod

{

public PublicMethod()

{

//

// TODO: 在此处添加构造函数逻辑

//

}

[DllImport("User32.dll", CharSet = CharSet.Auto)]

public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);

public static void Kill(Excel.Application excel)

{

IntPtr t = new IntPtr(excel.Hwnd); //得到这个句柄，具体作用是得到这块内存入口

int k = 0;

GetWindowThreadProcessId(t, out k); //得到本进程唯一标志k

System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k); //得到对进程k的引用

p.Kill(); //关闭进程k

}

}