/// <summary>
/// 转换表达式
/// </summary>
/// <param name="expression"></param>
private void convertMemberAccess(MemberExpression expression)
{
//if (expression.Expression != null && typeof(ParameterExpression).IsAssignableFrom(expression.Expression.GetType()))
if (expression.Expression != null && expression.Expression.NodeType == ExpressionType.Parameter)
{
string name = expression.Member.Name, sqlName = ConstantConverter.ConvertName(name);
if (FirstMemberName == null)
{
FirstMemberName = name;
FirstMemberSqlName = sqlName;
}
SqlStream.SimpleWrite(sqlName);
return;
}
whereExpression.ConvertMemberAccess(expression);
if (whereExpression.Type != WhereExpression.ConvertType.Unknown)
{
if (whereExpression.Expression.NodeType == ExpressionType.Constant)
{
convertConstant(whereExpression.Expression.GetConstantValue());
}
else
{
throw new InvalidCastException("未知成员表达式类型 " + expression.Member.Name + " " + whereExpression.Expression.NodeType.ToString());
}
}
else
{
throw new InvalidCastException("未知成员表达式 " + expression.Member.Name + " " + whereExpression.Type.ToString());
}
}
/// <summary>
/// 转换表达式
/// </summary>
/// <param name="expression"></param>
private void convertMemberAccess(MemberExpression expression)
{
if (expression.Expression != null && typeof(ParameterExpression).IsAssignableFrom(expression.Expression.GetType()))
{
string name = expression.Member.Name, sqlName = ConstantConverter.ConvertName(name);
if (FirstMemberName == null)
{
FirstMemberName = name;
FirstMemberSqlName = sqlName;
}
SqlStream.SimpleWriteNotNull(sqlName);
return;
}
object value = null;
if (expression.TryGetConstant(ref value))
{
convertConstant(value);
return;
}
throw new InvalidCastException("未知成员表达式类型 " + expression.Expression.GetType().Name);
}