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Cwince数据列表导出程序

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public void DataGridViewToExcel(DataGridView dgv)

{

#region 验证可操作

//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

Microsoft.Office.Interop.Excel.Application objExcel = null;

Microsoft.Office.Interop.Excel.Workbook objWorkbook = null;

Microsoft.Office.Interop.Excel.Worksheet objsheet = null;

try

{

//申明对象

objExcel = new Microsoft.Office.Interop.Excel.Application();

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

objsheet = (Microsoft.Office.Interop.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, Microsoft.Office.Interop.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);

}

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