DataTable数据与Excel表格的相互转换
using Excel = Microsoft.Office.Interop.Excel;
private static Excel.Application m_xlApp = null;
/// <summary>
/// 将DataTable数据导出到Excel表
/// </summary>
/// <param name="tmpDataTable">要导出的DataTable</param>
public static void ExportExcel(System.Data.DataTable tmpDataTable)
{
if (tmpDataTable == null)
{
return;
}
long rowNum = tmpDataTable.Rows.Count;//行数
int columnNum = tmpDataTable.Columns.Count;//列数
Excel.Application m_xlApp = new Excel.Application();
m_xlApp.DisplayAlerts = false;//不显示更改提示
m_xlApp.Visible = false;
string saveFileName = "";
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.DefaultExt = "xls";
saveDialog.Filter = "Excel 文件|*.xls";
saveDialog.FileName = "Sheet1";
saveDialog.ShowDialog();
saveFileName = saveDialog.FileName;
if (saveFileName.IndexOf(":") < 0)
{
return; //被点了取消
}
Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
if (xlApp == null)
{
MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
Excel.Workbooks workbooks = m_xlApp.Workbooks;
Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
try
{
if (rowNum > 65536)//单张Excel表格最大行数
{
long pageRows = 65535;//定义每页显示的行数,行数必须小于65536
int scount = (int)(rowNum / pageRows);//导出数据生成的表单数
if (scount * pageRows < rowNum)//当总行数不被pageRows整除时，经过四舍五入可能页数不准
{
scount = scount + 1;
}
for (int sc = 1; sc <= scount; sc++)
{
if (sc > 1)
{
object missing = System.Reflection.Missing.Value;
worksheet = (Excel.Worksheet)workbook.Worksheets.Add(
missing, missing, missing, missing);//添加一个sheet
}
else
{
worksheet = (Excel.Worksheet)workbook.Worksheets[sc];//取得sheet1
}
string[,] datas = new string[pageRows + 1, columnNum];
for (int i = 0; i < columnNum; i++) //写入字段
{
datas[0, i] = tmpDataTable.Columns[i].Caption;//表头信息
}
Excel.Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnNum]);
range.Interior.ColorIndex = 15;//15代表灰色
range.Font.Bold = true;
range.Font.Size = 9;
int init = int.Parse(((sc - 1) * pageRows).ToString());
int r = 0;
int index = 0;
int result;
if (pageRows * sc >= rowNum)
{
result = (int)rowNum;
}
else
{
result = int.Parse((pageRows * sc).ToString());
}
for (r = init; r < result; r++)
{
index = index + 1;
for (int i = 0; i < columnNum; i++)
{
object obj = tmpDataTable.Rows[r][tmpDataTable.Columns[i].ToString()];
datas[index, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加单引号是为了防止自动转化格式
}
System.Windows.Forms.Application.DoEvents();
//添加进度条
}
Excel.Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, columnNum]);
fchR.Value2 = datas;
worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。
m_xlApp.WindowState = Excel.XlWindowState.xlMaximized;//Sheet表最大化
range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, columnNum]);
//range.Interior.ColorIndex = 15;//15代表灰色
range.Font.Size = 9;
range.RowHeight = 14.25;
range.Borders.LineStyle = 1;
range.HorizontalAlignment = 1;
}
}
else
{
string[,] datas = new string[rowNum + 1, columnNum];
for (int i = 0; i < columnNum; i++) //写入字段
{
datas[0, i] = tmpDataTable.Columns[i].Caption;
}
Excel.Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnNum]);
range.Interior.ColorIndex = 15;//15代表灰色
range.Font.Bold = true;
range.Font.Size = 9;
int r = 0;
for (r = 0; r < rowNum; r++)
{
for (int i = 0; i < columnNum; i++)
{
object obj = tmpDataTable.Rows[r][tmpDataTable.Columns[i].ToString()];
datas[r + 1, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加单引号是为了防止自动转化格式
}
System.Windows.Forms.Application.DoEvents();
//添加进度条
}
Excel.Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[rowNum + 1, columnNum]);
fchR.Value2 = datas;
worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。
m_xlApp.WindowState = Excel.XlWindowState.xlMaximized;
range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[rowNum + 1, columnNum]);
//range.Interior.ColorIndex = 15;//15代表灰色
range.Font.Size = 9;
range.RowHeight = 14.25;
range.Borders.LineStyle = 1;
range.HorizontalAlignment = 1;
}
workbook.Saved = true;
workbook.SaveCopyAs(saveFileName);
if (System.IO.File.Exists(saveFileName))
{
System.Diagnostics.Process.Start(saveFileName); //打开EXCE
}
}
catch (Exception ex)
{
MessageBox.Show("导出异常：" + ex.Message, "导出异常", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally
{
EndReport();
}
}
/// <summary>
/// 退出报表时关闭Excel和清理垃圾Excel进程
/// </summary>
private static void EndReport()
{
object missing = System.Reflection.Missing.Value;
try
{
m_xlApp.Workbooks.Close();
m_xlApp.Workbooks.Application.Quit();
m_xlApp.Application.Quit();
m_xlApp.Quit();
}
catch { }
finally
{
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp.Workbooks);
System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp.Application);
System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp);
m_xlApp = null;
}
catch { }
try
{
//清理垃圾进程
killProcessThread();
}
catch { }
GC.Collect();
}
}
/// <summary>
/// 杀掉不死进程
/// </summary>
private static void killProcessThread()
{
ArrayList myProcess = new ArrayList();
for (int i = 0; i < myProcess.Count; i++)
{
try
{
System.Diagnostics.Process.GetProcessById(int.Parse((string)myProcess[i])).Kill();
}
catch { }
}
}
/// <summary>
/// 从Excel表导入数据
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static DataSet GetPCExcelDataInfo(string path)
{
OleDbConnection objConn = null;
try
{
// 拼写连接字符串，打开连接
string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + path + ";Extended Properties='Excel 8.0; HDR=NO; IMEX=1'";
objConn = new OleDbConnection(strConn);
objConn.Open();
// 取得Excel工作簿中所有工作表
DataTable schemaTable = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
OleDbDataAdapter sqlada = new OleDbDataAdapter();
DataSet ds = new DataSet();
// 遍历工作表取得数据并存入Dataset
foreach (DataRow dr in schemaTable.Rows)
{
string strSql = "Select * From [" + dr[2].ToString().Trim() + "]";
OleDbCommand objCmd = new OleDbCommand(strSql, objConn);
sqlada.SelectCommand = objCmd;
sqlada.Fill(ds, dr[2].ToString().Trim());
}
return ds;
}
catch (Exception ex)
{
MessageBox.Show("操作xls文本文件：" + ex.Message);
return null;
}
finally
{
objConn.Close();
}
}
