Question

C#中如何读取excel中多个sheet-CSDN论坛

Answer 1

Com组件的方式读取Excel :
这种方式需要先引用 Microsoft.Office.Interop.Excel 。首选说下这种方式的优缺点
优点：可以非常灵活的读取Excel中的数据
缺点：如果是Web站点部署在IIS上时，还需要服务器机子已安装了Excel，有时候还需要为配置IIS权限。最重要的一点因为是基于单元格方式读取的，所以数据很慢。
代码如下：
DataTable GetDataFromExcelByCom(bool hasTitle = false)
{
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;

Excel.Application app = new Excel.Application();
Excel.Sheets sheets;
object oMissiong = System.Reflection.Missing.Value;
Excel.Workbook workbook = null;
DataTable dt = new DataTable();

try
{
if (app == null) return null;
workbook = app.Workbooks.Open(excelFilePath, 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
Excel.Worksheet worksheet = (Excel.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 = ((Excel.Range)worksheet.Cells[1, i + 1]).Text.ToString();
if (!string.IsNullOrWhiteSpace(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
Excel.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 = (Excel.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;
}
}

Answer 2

 string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + Path + ";" + "Extended Properties='Excel 8.0;HDR=YES;IMEX=1';";
            OleDbConnection conn = new OleDbConnection(strConn);
            OleDbDataAdapter myCommand = null;
            DataSet ds = new DataSet();
            int result = 1;
                           conn.Open();
                System.Data.DataTable dtName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });
                
                foreach (DataRow dr1 in dtName.Rows)
                    {
                        string result = dr1["TABLE_NAME"].ToString() ;//这个就是其中一个Sheet
                                            }

string strExcel = "select * from [" + result  + "]";//这是你选定的sheet
DataSet ds = new DataSet();
myCommand.Fill(ds, "table1");

//部分代码手打.有问题再联系我.