C#导出DataGridView到Excel

public class ExcelHelper
{
private static object missing = Type.Missing;

#region ================导出=================
/// <summary>
/// 导出到Excel
/// </summary>
/// <param name="dgv"></param>
public static void ExportToExcel(System.Windows.Forms.DataGridView dgv)
{
ExportToExcel(dgv, 0, dgv.Columns.Count);
}
/// <summary>
/// 导出到Excel
/// </summary>
/// <param name="dgv"></param>
/// <param name="startColumnIndex">从第几列开始</param>
public static void ExportToExcel(System.Windows.Forms.DataGridView dgv, int startColumnIndex)
{
ExportToExcel(dgv, startColumnIndex, dgv.Columns.Count);
}
/// <summary>
/// 导出到Excel
/// </summary>
/// <param name="dgv"></param>
/// <param name="startColumnIndex">从第几列开始</param>
/// <param name="endColumnIndex">到第几列结束</param>
public static void ExportToExcel(System.Windows.Forms.DataGridView dgv, int startColumnIndex, int endColumnIndex)
{
if (dgv.Rows.Count == 0)
return;
try
{
Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
app.Visible = false;
app.UserControl = false;
Microsoft.Office.Interop.Excel.Workbook wb = app.Workbooks.Add(missing);
Microsoft.Office.Interop.Excel.Worksheet ws = app.ActiveWorkbook.Sheets[1] as Microsoft.Office.Interop.Excel.Worksheet;
try
{
ExportToExcel(app, wb, ws, dgv, startColumnIndex, endColumnIndex);
}
finally
{
app.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(app);
GC.Collect();
}
}
catch
{
System.Windows.Forms.MessageBox.Show("无法正常启动计算机上的EXCEL软件！", "系统提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Warning);
}
}

/// <summary>
/// 导出到excel
/// </summary>
/// <param name="app"></param>
/// <param name="wb"></param>
/// <param name="ws"></param>
/// <param name="dgv"></param>
/// <param name="startColumnIndex">从第几列开始</param>
/// <param name="startColumnIndex">到第几列结束</param>
private static void ExportToExcel(Microsoft.Office.Interop.Excel.Application app, Microsoft.Office.Interop.Excel._Workbook wb, Microsoft.Office.Interop.Excel.Worksheet ws, System.Windows.Forms.DataGridView dgv, int startColumnIndex, int endColumnIndex)
{
Microsoft.Office.Interop.Excel.Range range;
int rowCount = dgv.Rows.Count;
int colCount = 0;
int colIndex = 0;
int rowIndex = 0;
#region 开始到结束

int startIndex = 0;//开始的列索引
int endIndex = dgv.Columns.Count;//结束的列索引
if (endColumnIndex < endIndex)
endIndex = endColumnIndex;
if (startIndex < endIndex && startColumnIndex < endIndex)
{
startIndex = startColumnIndex;
}
#endregion
for (int i = startIndex; i < endIndex; i++)
{
if (!dgv.Columns[i].Visible)
continue;
colCount++;
}
//foreach (DataGridViewColumn col in dgv.Columns)
//{
//    if (!col.Visible)
//        continue;
//    colCount++;
//}
#region "Set title"
String endCellAddress = "";
if (colCount > 0 && colCount <= 26)
{
endCellAddress = ((char)('A' + colCount)).ToString() + "1";
}
else if (colCount > 26 && colCount < 26 * 26)
{
int iTemp = (int)Math.Ceiling((double)colCount / (double)26);
endCellAddress = ((char)('A' + iTemp)).ToString() + ((char)('A' + (colCount - 26 * 26))).ToString() + "1";
}
else
{
throw new Exception("列数太多，操作出错！");
}
ws.Cells[1, 1] = "导出数据";
range = ws.get_Range("A1", endCellAddress);
range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;
range.Font.Size = 20;
range.Font.Name = "黑体";
range.Borders.LineStyle = 1;
range.Select();
range.Merge(false);
//range.Merge(ws.get_Range("A1", endCellAddress));
#endregion "Set title"

#region " Set Header Values "
object[,] colValues = new object[1, colCount + 1];
colIndex = 0;
colValues[0, colIndex] = "序号";
for (int i = startIndex; i < endIndex; i++)
{
if (!dgv.Columns[i].Visible)
continue;
colValues[0, colIndex + 1] = dgv.Columns[i].HeaderText;
colIndex++;
}
//foreach (DataGridViewColumn col in dgv.Columns)
//{
//    if (!col.Visible)
//        continue;
//    colValues[0, colIndex + 1] = col.HeaderText;
//    colIndex++;
//}

range = ws.get_Range(GetExcelCellName(1, 2), GetExcelCellName(colCount + 1, 2));
range.Value2 = colValues;
#endregion

#region " Header Style "
range.Font.Bold = true;
range.Font.Name = "Georgia";
range.Font.Size = 10;
range.RowHeight = 26;
range.EntireColumn.AutoFit();
#endregion

#region " Set Row Values "
object[,] rowValues = new object[rowCount, colCount + 1];
rowIndex = 0;
foreach (System.Windows.Forms.DataGridViewRow row in dgv.Rows)
{
colIndex = 0;
rowValues[rowIndex, colIndex] = rowIndex + 1;
foreach (System.Windows.Forms.DataGridViewCell cell in row.Cells)
{
if (cell.ColumnIndex == 0)
{
colIndex++;
continue;
}
if (row.Cells[colIndex].Value.ToString().IsInt())
rowValues[row.Index, colIndex] = string.Format("'{0}", row.Cells[colIndex].Value.ToString());
else
rowValues[row.Index, colIndex] = row.Cells[colIndex].Value.ToString();
colIndex++;
}
rowIndex++;
}

range = ws.get_Range(GetExcelCellName(1, 3), GetExcelCellName(colCount + 1, rowCount + 2));
range.Value2 = rowValues;
#endregion

#region " Row Style "
range.Font.Name = "Georgia";
range.Font.Size = 9;
range.RowHeight = 18;
range.EntireColumn.AutoFit();
range.Borders.ColorIndex = 2;
#endregion

#region " Set Borders "
range = ws.get_Range(GetExcelCellName(1, 1), GetExcelCellName(colCount + 1, rowCount + 2));
range.VerticalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;
range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;
range.Borders.Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
range.Borders.Color = System.Drawing.Color.Black.ToArgb();
#endregion
}

#region " GetCellName "

private static string GetExcelCellName(int fColIndex, int fRowIndex)
{
if (fColIndex <= 0 || fColIndex > 256)
{
throw new Exception("Excel 列索引数值超出范围(1-256)!");
}
else if (fColIndex <= 26)
{
return GetExcelCellName(fColIndex) + fRowIndex.ToString();
}
else
{
string retLetter = GetExcelCellName(fColIndex / 26);
retLetter += GetExcelCellName(fColIndex % 26);
retLetter += fRowIndex.ToString();
return retLetter;
}
}

private static string GetExcelCellName(int fColIndex)
{
int i = 1;
foreach (string letter in Enum.GetNames(typeof(ExcelColumnLetters)))
{
if (i == fColIndex)
return letter;
i++;
}
throw new Exception("Excel 列索引数值超出范围(1-256)!");
}

#endregion

public enum ExcelColumnLetters
{
A = 1,
B = 2,
C = 3,
D = 4,
E = 5,
F = 6,
G = 7,
H = 8,
I = 9,
J = 10,
K = 11,
L = 12,
M = 13,
N = 14,
O = 15,
P = 16,
Q = 17,
R = 18,
S = 19,
T = 20,
U = 21,
V = 22,
W = 23,
X = 24,
Y = 25,
Z = 26
}
#endregion

}