/// <summary>
/// 输出转化器
/// </summary>
/// <param name="expr"></param>
/// <param name="fields"></param>
/// <returns></returns>
public static IOutputConvert GetOutputConvert(string expr, out string[] fields)
{
string fun = GetFun(expr);
fields = GetArgs(expr);
IOutputConvert converter = AppCtx.Cache.RetrieveObject <IOutputConvert>(GetOutputConvertKey(fun));
if (converter == null)
{
string typestr = ModelConfig.Converters[fun];
converter = Utils.CreateInstance <IOutputConvert>(ModelConfig.Converters[fun]);
if (converter == null)
{
throw new SysException("不存在当前转化器" + fun);
}
AppCtx.Cache.AddObjectWithFileChange(GetOutputConvertKey(fun), converter, ModelConfig.ConfigFilePath);
}
return(converter);
}
/// <summary>
/// 扩展数据表格
/// </summary>
/// <param name="dt"></param>
/// <param name="dcc"></param>
public static void ExtendDataTable(DataTable dt, We7DataColumnCollection dcc)
{
foreach (We7DataColumn column in dcc)
{
if (!dt.Columns.Contains(column.Name) && (column.Direction == ParameterDirection.ReturnValue || column.Direction == ParameterDirection.Output || column.Direction == ParameterDirection.InputOutput))
{
dt.Columns.Add(column.Name);
}
}
foreach (DataRow row in dt.Rows)
{
if (!row.Table.Columns.Contains("Object"))
{
continue;
}
foreach (We7DataColumn column in dcc)
{
IOutputConvert convert = null;
string[] fields;
if (column.Direction == ParameterDirection.InputOutput || column.Direction == ParameterDirection.Output)
{
fields = new string[] { String.IsNullOrEmpty(column.Mapping) ? column.Name : column.Mapping };
convert = new GetEntityValue();
if (row[column.Name] == DBNull.Value)
{
row[column.Name] = convert.Convert(column, row, fields, row["Object"]);
}
}
else if (column.Direction == ParameterDirection.ReturnValue)
{
convert = ConvertHelper.GetOutputConvert(column.Expression, out fields);
row[column.Name] = convert.Convert(column, row, fields, row["Object"]);
}
}
}
}