/// <summary>
///
/// </summary>
/// <param name="dataField"></param>
/// <param name="action"></param>
public void IfExists(string dataField, Action <SqlClauseBuilderItemIUW> action)
{
if (action != null)
{
SqlClauseBuilderItemIUW builderItem = (SqlClauseBuilderItemIUW)this.Find(item => ((SqlClauseBuilderItemIUW)item).DataField == dataField);
if (builderItem != null)
{
action(builderItem);
}
}
}
/// <summary>
/// 添加一个构造项
/// </summary>
/// <typeparam name="T">数据的类型</typeparam>
/// <returns>返回这个Builder自己，便于编写连续AppendItem语句，例如b.AppendItem(...).AppendItem(...)</returns>
/// <param name="dataField">Sql语句中的字段名</param>
/// <param name="data">操作的数据</param>
/// <param name="op">操作运算符</param>
/// <param name="isExpression">操作的数据是否是表达式</param>
public virtual TBuilder AppendItem <T>(string dataField, T data, string op, bool isExpression)
{
SqlClauseBuilderItemIUW item = (SqlClauseBuilderItemIUW)CreateBuilderItem();
item.DataField = dataField;
item.IsExpression = isExpression;
item.Operation = op;
item.Data = data;
List.Add(item);
return((TBuilder)this);
}
