DataGridView 資料導出為EXCEL

1. 采用流方式private void DataGridViewToExcel(DataGridView dgv)

   {

   SaveFileDialog dlg = new SaveFileDialog();

   dlg.Filter = "Execl files (*.xls)|*.xls";

   dlg.FilterIndex = 0;

   dlg.RestoreDirectory = true;

   dlg.CreatePrompt = true;

   dlg.Title = "儲存為Excel檔案";

   if (dlg.ShowDialog() == DialogResult.OK)

   {

   Stream myStream;

   myStream = dlg.OpenFile();

   StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));

   string columnTitle = "";

   try

   {

   //寫入列标題

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

   {

   if (i > 0)

   {

   columnTitle += "/t";

   }

   columnTitle += dgv.Columns[i].HeaderText;

   }

   sw.WriteLine(columnTitle);

   //寫入列内容

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

   {

   string columnValue = "";

   for (int k = 0; k < dgv.Columns.Count; k++)

   {

   if (k > 0)

   {

   columnValue += "/t";

   }

   if (dgv.Rows[j].Cells[k].Value == null)

   columnValue += "";

   else

   columnValue += dgv.Rows[j].Cells[k].Value.ToString().Trim();

   }

   sw.WriteLine(columnValue);

   }

   sw.Close();

   myStream.Close();

   }

   catch (Exception e)

   {

   MessageBox.Show(e.ToString());

   }

   finally

   {

   sw.Close();

   myStream.Close();

   }

   }

   }

2. 顯示Excel界面

/// <summary>

///方法，導出DataGridView中的資料到Excel檔案

/// </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 DataGridViewToExcel(DataGridView dgv)

{

#region 驗證可操作性

//申明儲存對話框

SaveFileDialog dlg = new SaveFileDialog();

//默然檔案字尾

dlg.FileName = "BwPData.xlsx";

dlg.DefaultExt = "xlsx";

//檔案字尾清單

dlg.Filter = "EXCEL2007檔案|*.xlsx|所有類型檔案|*.*";

//默然路徑是系統目前路徑

dlg.InitialDirectory = Directory.GetCurrentDirectory();

//打開儲存對話框

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

//傳回檔案路徑

string fileNameString = dlg.FileName;

//驗證strFileName是否為空或值無效

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

{ return; }

//定義表格内資料的行數和列數

int rowscount = dgv.Rows.Count;

int colscount = dgv.Columns.Count;

//行數必須大于0

if (rowscount <= 0)

{

MessageBox.Show("沒有資料可供儲存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

//列數必須大于0

if (colscount <= 0)

{

MessageBox.Show("沒有資料可供儲存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

//行數不可以大于65536

if (rowscount > 65536)

{

MessageBox.Show("資料記錄數太多(最多不能超過65536條)，不能儲存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

//列數不可以大于255

if (colscount > 255)

{

MessageBox.Show("資料記錄行數太多，不能儲存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

//驗證以fileNameString命名的檔案是否存在，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, "删除失敗 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);

return;

}

}

#endregion

#region 驗證可操作性

Excel.Application objExcel = null;

Excel.Workbook objWorkbook = null;

Excel.Worksheet objsheet = null;

try

{

//申明對象

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

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

objsheet = (Excel.Worksheet)objWorkbook.ActiveSheet;

//設定EXCEL不可見

objExcel.Visible = false;

//向Excel中寫入表格的表頭

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++;

}

}

//設定進度條

//ProgressBar SystemStatetempProgressBar = new ProgressBar();

//SystemStatetempProgressBar.Refresh();

//SystemStatetempProgressBar.Visible = true;

//SystemStatetempProgressBar.Minimum = 1;

//SystemStatetempProgressBar.Maximum = dgv.RowCount;

//SystemStatetempProgressBar.Step = 1;

//向Excel中逐行逐列寫入表格中的資料

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

{

//SystemStatetempProgressBar.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)

{

}

}

}

}

//隐藏進度條

//SystemStatetempProgressBar.Visible = false;

//儲存檔案

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

{

//關閉Excel應用

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導出完畢! ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

#endregion

}