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  • 批量插入bulkcopy

     public static void InsertBatch<T>(IDbConnection conn, IEnumerable<T> entityList, string tblName, IDbTransaction transaction = null) where T : class
            {
                if (conn.State == ConnectionState.Closed)
                    conn.Open();
                using (var bulkCopy = new SqlBulkCopy(conn as SqlConnection))
                {
                    var enumerable = entityList as T[] ?? entityList.ToArray();
                    bulkCopy.BatchSize = enumerable.Count();
                    bulkCopy.DestinationTableName = tblName;
                    var table = new DataTable();
                    DapperExtensions.Sql.ISqlGenerator sqlGenerator = new SqlGeneratorImpl(new DapperExtensionsConfiguration());
                    var classMap = sqlGenerator.Configuration.GetMap<T>();
                    IPropertyMap[] props;
                    if (tblName == "RepayRecords")
                    {
                        props = classMap.Properties.Where(x => x.Ignored == false && x.ColumnName != "DeductWays").ToArray();
                    }
                    else
                    {
                        props = classMap.Properties.Where(x => x.Ignored == false).ToArray();
                    }

                    foreach (var propertyInfo in props)
                    {
                        bulkCopy.ColumnMappings.Add(propertyInfo.Name, propertyInfo.Name);
                        table.Columns.Add(propertyInfo.Name, Nullable.GetUnderlyingType(propertyInfo.PropertyInfo.PropertyType) ?? propertyInfo.PropertyInfo.PropertyType);
                    }
                    var values = new object[props.Count()];
                    foreach (var itemm in enumerable)
                    {
                        for (var i = 0; i < values.Length; i++)
                        {
                            values[i] = props[i].PropertyInfo.GetValue(itemm, null);
                        }
                        table.Rows.Add(values);
                    }
                    bulkCopy.WriteToServer(table);
                }
            } 
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  • 原文地址:https://www.cnblogs.com/xuyufeng/p/9907964.html
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