DataGridView导出到Excel的三个方法

#region DataGridView数据显示到Excel

/// <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

bool
DataGridviewShowToExcel(DataGridView dgv,
bool
isShowExcle)

{

if
(dgv.Rows.Count == 0)

return

false
;

//建立Excel对象

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

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();

}

}

}

return

true
;

}

#endregion

#region DateGridView导出到csv格式的Excel

/// <summary>

/// 常用方法，列之间加/t，一行一行输出，此文件其实是csv文件，不过默认可以当成Excel打开。

/// </summary>

/// <remarks>

/// using System.IO;

/// </remarks>

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

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 = "保存为Excel文件"
;

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

{

Stream myStream;

myStream = dlg.OpenFile();

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

string
columnTitle =
""
;

try

{

//写入列标题

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

{

if
(i > 0)

{

columnTitle += "/t"
;

}

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

}

sw.WriteLine(columnTitle);

//写入列内容

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();

}

}

}

#endregion

#region DataGridView导出到Excel，有一定的判断性

/// <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
DataGridViewToExcel(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
Microsoft.Office.Interop.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);

}

#endregion