/// <summary>
/// 复制一个MappingItem
/// </summary>
/// <returns></returns>
public ORMappingItem Clone()
{
ORMappingItem newItem = new ORMappingItem();
newItem.dataFieldName = this.dataFieldName;
newItem.propertyName = this.propertyName;
newItem.subClassPropertyName = this.subClassPropertyName;
newItem.isIdentity = this.isIdentity;
newItem.primaryKey = this.primaryKey;
newItem.length = this.length;
newItem.isNullable = this.isNullable;
newItem.subClassTypeDescription = this.subClassTypeDescription;
newItem.bindingFlags = this.bindingFlags;
newItem.defaultExpression = this.defaultExpression;
newItem.memberInfo = this.memberInfo;
newItem.enumUsage = this.enumUsage;
newItem.isUpdateWhere = this.isUpdateWhere;
return(newItem);
}
private static DbParameter DoInsertUpdateSqlWithParamBuilder <T>(SqlClauseBuilderIUW builder, ORMappingItem item, T graph)
{
DbParameter param = TSqlBuilder.Instance.CreateDbParameter();
if (item.IsIdentity == false)
{
object data = GetValueFromObject(item, graph);
if ((data == null || data == DBNull.Value || (data != null && data.Equals(TypeCreator.GetTypeDefaultValue(data.GetType())))) &&
string.IsNullOrEmpty(item.DefaultExpression) == false)
{
builder.AppendItem(item.DataFieldName, item.DefaultExpression, SqlClauseBuilderBase.EqualTo, true);
}
else
{
builder.AppendItem(item.DataFieldName, data);
}
}
return(param);
}