private SourceTable ExecuteDataTable <TResult>(QuerySection <TResult> query)
where TResult : Entity
{
try
{
string queryString = query.QueryString;
string cacheKey = GetCacheKey(queryString, query.Parameters);
object obj = GetCache <TResult>("DataTable", cacheKey);
if (obj != null)
{
return((SourceTable)obj);
}
//添加参数到Command中
queryCommand = dbProvider.CreateSqlCommand(queryString, query.Parameters);
using (DataTable dataTable = dbProvider.ExecuteDataTable(queryCommand, dbTran))
{
dataTable.TableName = typeof(TResult).Name;
SourceTable table = new SourceTable(dataTable);
SetCache <TResult>("DataTable", cacheKey, table);
return(table);
}
}
catch
{
throw;
}
}
/// <summary>
/// 转换为SourceTable
/// </summary>
/// <returns></returns>
public SourceTable ToTable()
{
var sourceTable = new SourceTable();
sourceTable.Load(reader);
reader.Close();
reader.Dispose();
return(sourceTable);
}
/// <summary>
/// 返回一个行阅读对象
/// </summary>
IRowReader IEntityBase.ToRowReader()
{
lock (this)
{
try
{
SourceList <EntityBase> list = new SourceList <EntityBase>();
list.Add(this);
DataTable dt = list.GetDataTable(this.GetType());
ISourceTable table = new SourceTable(dt);
return(table[0]);
}
catch (Exception ex)
{
throw new DataException("数据转换失败！", ex);
}
}
}
/// <summary>
/// 选择某些列
/// </summary>
/// <param name="names"></param>
/// <returns></returns>
public SourceTable Select(params string[] names)
{
SourceTable st = this.Clone();
List <string> namelist = new List <string>(names);
namelist.ForEach(p => p.ToLower());
foreach (DataColumn column in this.Columns)
{
if (!namelist.Contains(column.ColumnName.ToLower()))
{
st.Columns.Remove(column.ColumnName);
}
}
int index = 0;
namelist.ForEach(p => st.Columns[p].SetOrdinal(index++));
return(st);
}
/// <summary>
/// 实例化填充关系
/// </summary>
/// <param name="source"></param>
/// <param name="relationName"></param>
public FillRelation(SourceTable source, string parentName, string childName)
{
this.DataSource = source;
this.ParentName = parentName;
this.ChildName = childName;
}
/// <summary>
/// 实例化填充关系
/// </summary>
/// <param name="source"></param>
/// <param name="relationName"></param>
public FillRelation(SourceTable source, string relationName)
: this(source, relationName, relationName)
{
}