namespace YourNamespace { /// /// Uses the Name value of the <see cref="ColumnAttribute"/> specified to determine /// the association between the name of the column in the query results and the member to /// which it will be extracted. If no column mapping is present all members ...
Type type){//1. 取得sql select所有栏位名称var names = Enumerable.Range(0, reader.FieldCount).Select(index => reader.GetName(index)).ToArray();//2. 取得mapping类别的属性资料 > 将index,sql栏位,class属性资料做好对应封装在一个变量内方便后面使用var props = type.GetProperties().ToList(); ...
/// Uses the Name value of the <see cref="ColumnAttribute"/> specified to determine /// the association between the name of the column in the query results and the member to /// which it will be extracted. If no column mapping is present all members are mapped as /// usual. ///...
取得mapping类别的属性资料 > 将index,sql栏位,class属性资料做好对应封装在一个变量内方便后面使用 var props = type.GetProperties().ToList(); var members = names.Select((columnName, index) => { var property = props.Find(p => string.Equals(, columnName, StringComparison.Ordinal)) ?? props.Fi...
dapper 自定义数据库字段和代码中Model字段不一致时候的mapping方法 namespace YourNamespace { /// /// Uses the Name value of the ColumnAttribute specified, otherwise maps as usual. /// /// <typeparam name="T">The type of the object that this mapper applies to.</typeparam 对.net orm工具...
Get<int>("@c");Ansi Strings and varcharDapper supports varchar params, if you are executing a where clause on a varchar column using a param be sure to pass it in this way:Query<Thing>("select * from Thing where Name = @Name", new {Name = new DbString { Value = "abcde", Is...
Dapper是一个轻量级的ORM(Object Relational Mapping)框架,它简化了在关系型数据库和应用程序之间进行数据访问的过程。使用Dapper提供多个参数,可以通过以下步骤实现:...
ColumnName).ToList()); insertCount = bulk.Load(); tran.Commit(); } } } } catch (Exception ex) { throw ex; } return insertCount; // File.Delete(path); } /// ///将DataTable转换为标准的CSV /// /// 数据表 /// <returns>返回标准的CSV</returns> private string DataTableToCsv...
Dapper supports varchar params, if you are executing a where clause on a varchar column using a param be sure to pass it in this way: Query<Thing>("select * from Thing where Name = @Name",new{Name =newDbString { Value ="abcde", IsFixedLength =true, Length =10, IsAnsi =true});...
[0]; parameter.Value = value; DbType dbType = ColumnTypeUtil.GetDBType(value); parameter.DbType = dbType; return parameter; } #endregion #region Create SQL public string CreateGetMaxIdSql(string tableName, string key) { return string.Format("SELECT Max({0}) FROM {1}", key, table...