摘要：
dt.列。Add（newDataColumn（name，typeof（string））；}//生成行数据Rangerange；introwIdx=hasTitle？2:1; 对于（intiRow=rowIdx；iRow˂=iRowCount；iRow++）｛DataRowdr=dt.NewRow（）；对于（intiCol=1；iCol˂=iColCount；iCol++）{range=（range）工作表。Cells[iRow，iCol]；dr[iCol-1]=（range.Value2==null）？
System.Data.DataTable GetDataFromExcelByCom(bool hasTitle, string fileName)
{
//OpenFileDialog openFile = new OpenFileDialog();
//openFile.Filter = "Excel(*.xlsx)|*.xlsx|Excel(*.xls)|*.xls";
//openFile.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
//openFile.Multiselect = false;
//if (openFile.ShowDialog() == DialogResult.Cancel) return null;
//var excelFilePath = openFile.FileName;
Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
Sheets sheets;
object oMissiong = System.Reflection.Missing.Value;
Workbook workbook = null;
System.Data.DataTable dt = new System.Data.DataTable();
try
{
if (app == null) return null;
workbook = app.Workbooks.Open(fileName, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong,
oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong);
sheets = workbook.Worksheets;
//将数据读入到DataTable中
Worksheet worksheet = (Worksheet)sheets.get_Item(1);//读取第一张表
if (worksheet == null) return null;
int iRowCount = worksheet.UsedRange.Rows.Count;
int iColCount = worksheet.UsedRange.Columns.Count;
//生成列头
for (int i = 0; i < iColCount; i++)
{
var name = "column" + i;
if (hasTitle)
{
var txt = ((Range)worksheet.Cells[1, i + 1]).Text.ToString();
if (!string.IsNullOrEmpty(txt)) name = txt;
}
while (dt.Columns.Contains(name)) name = name + "_1";//重复行名称会报错。
dt.Columns.Add(new DataColumn(name, typeof(string)));
}
//生成行数据
Range range;
int rowIdx = hasTitle ? 2 : 1;
for (int iRow = rowIdx; iRow <= iRowCount; iRow++)
{
DataRow dr = dt.NewRow();
for (int iCol = 1; iCol <= iColCount; iCol++)
{
range = (Range)worksheet.Cells[iRow, iCol];
dr[iCol - 1] = (range.Value2 == null) ? "" : range.Text.ToString();
}
dt.Rows.Add(dr);
}
return dt;
}
catch { return null; }
finally
{
workbook.Close(false, oMissiong, oMissiong);
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
workbook = null;
app.Workbooks.Close();
app.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(app);
app = null;
}
}