Question

我通过这些函数将大约1943条记录插入到SQLCE中。这是我的插入函数。参数来自StringReader（字符串来自webservice）。这个函数执行1943次，大约需要20秒。我删除了表的索引，什么可以我做了改进吗？我只创建了一次mycomm和sqlceresultset。

Public Function Insert_Function(ByVal f_Line() As String, ByRef myComm As SqlCeCommand, ByRef rs As SqlCeResultSet) As String
    Try
        Dim rec As SqlCeUpdatableRecord = rs.CreateRecord()
        rec.SetInt32(0, IIf(f_Line(1) = "", DBNull.Value, f_Line(1)))
        rec.SetInt32(1, IIf(f_Line(2) = "", DBNull.Value, f_Line(2)))
        rec.SetInt32(2, IIf(f_Line(3) = "", DBNull.Value, f_Line(3)))
        rec.SetInt32(3, IIf(f_Line(4) = "", DBNull.Value, f_Line(4)))
        rec.SetValue(4, IIf(f_Line5(5) = "", DBNull.Value, f_Line(5)))
        rs.Insert(rec)
        rec = Nothing
    Catch ex As Exception
        strerr_col = ex.Message
    End Try
    Return strerr_col
End Function

Answer 1

当您尝试设置调用SetInt32的DBNull.Value时，我认为您会遇到异常。我设法使用以下代码在一秒钟内插入一万条记录：

            using (var cn = new SqlCeConnection(ConnectionString))
        {
            using (var cmd = new SqlCeCommand())
            {
                cn.Open();
                cmd.Connection = cn;
                cmd.CommandText = "TableName";
                cmd.CommandType = CommandType.TableDirect;

                using (var rs = cmd.ExecuteResultSet(ResultSetOptions.None))
                {
                    var record = rs.CreateRecord();

                    using (var reader = new StringReader(input))
                    {
                        string line;
                        while ((line = reader.ReadLine()) != null)
                        {
                            var index = 0;
                            var values = line.Split(new[] { ',' });

                            record.SetValue(index, values[index++] == string.Empty ? (object)DBNull.Value : values[index - 1]);
                            record.SetValue(index, values[index++] == string.Empty ? (object)DBNull.Value : values[index - 1]);
                            record.SetValue(index, values[index++] == string.Empty ? (object)DBNull.Value : values[index - 1]);
                            record.SetValue(index, values[index++] == string.Empty ? (object)DBNull.Value : values[index - 1]);
                            record.SetValue(index, values[index++] == string.Empty ? (object)DBNull.Value : values[index - 1]);
                            rs.Insert(record);
                        }
                    }
                }
            }
        }

有关插入SQLCE的建议

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