Question

我有同样的问题。但不同之处在于我的空行位于中间，我有超过50列。用户想要查看重复的行，这意味着我无法使用SELECT DISTINCT * FROM [excel]

空行可以在任何地方。到目前为止，我面临的最大优势超过100,000行。

是否有更有效的方法来删除空行，或者我必须循环并检查每一行中的所有列？

   void SelectDataFromExcel()
        {

            string connectionString = ConfigurationSettings.AppSettings["ExcelConn"].ToString();
            OleDbConnection excelConnection = new OleDbConnection(connectionString);
            excelConnection.Open();   
            OleDbCommand dbCommand;
            OleDbDataAdapter dataAdapter;
             foreach (var sheet in Sheets)
            {
                dbCommand = new OleDbCommand("select DISTINCT* From[" + sheet + "$]", excelConnection);
                System.Threading.Thread.Sleep(1000);
                this.Invoke((MethodInvoker)delegate
                {
                    listBox1.Items.Add("Tablo ismi: " + sheet.ToUpper(CultureInfo.InvariantCulture) + " Tablo Satır Sayısı: "+ dSet.Tables[sheet].Rows[0][0].ToString());
                });
                dataAdapter = new OleDbDataAdapter(dbCommand);
                dTable = new DataTable();
                dataAdapter.Fill(dTable);
                dTable.TableName = sheet.ToUpper(CultureInfo.InvariantCulture);;

                ArrangedDataList(dTable);
                FillSqlTable(dTable, dTable.TableName);
                dTable.Dispose();
                dataAdapter.Dispose();
                dbCommand.Dispose();
            }

            excelConnection.Close();
            excelConnection.Dispose();
            t1.Abort();
        }

Answer 1

修改

这将删除每个列中没有任何内容或空格的所有行：

dataTable = dataTable.Rows.Cast<DataRow>(). Where(row => !row.ItemArray.All(field => field is System.DBNull || string.Compare((field as string).Trim(), string.Empty) == 0)).CopyToDataTable();

<强>预

实现目标的一种方法是检查空值

DataView dv = null; dv = new DataView(); { dv.Table = myDatatable; dv.AllowDelete = true; dv.AllowEdit = true; dv.AllowNew = true; dv.RowFilter = "myField = ' '"; }

Answer 2

试试这个

for (int i = dt.Rows.Count - 1; i >= 0; i--)
{
    if (dt.Rows[i][0].ToString() == String.Empty )
    {
        dt.Rows.RemoveAt(i);
    }
}

Answer 3

这对我也有用。

 DataTable dt = table.Rows.Cast<DataRow>().Where(r => string.Join("",  r.ItemArray).Trim() != string.Empty).CopyToDataTable();

如何从Excel中删除DataTable中的空行？

3 个答案: