/// <summary>
/// GroupBy
/// </summary>
/// <param name="expression">表达式树</param>
/// <param name="sqlWrapper">sql打包对象</param>
/// <returns>SqlWrapper</returns>
public override SqlWrapper GroupBy(NewArrayExpression expression, SqlWrapper sqlWrapper)
{
for (var i = 0; i < expression.Expressions.Count; i++)
{
SqlExpressionProvider.GroupBy(expression.Expressions[i], sqlWrapper);
}
sqlWrapper.Remove(sqlWrapper.Length - 1, 1);
return(sqlWrapper);
}
/// <summary>
/// GroupBy
/// </summary>
/// <param name="expression">表达式树</param>
/// <param name="sqlWrapper">sql打包对象</param>
/// <returns>SqlWrapper</returns>
public override SqlWrapper GroupBy(NewExpression expression, SqlWrapper sqlWrapper)
{
foreach (Expression item in expression.Arguments)
{
SqlExpressionProvider.GroupBy(item, sqlWrapper);
sqlWrapper += ",";
}
sqlWrapper.Remove(sqlWrapper.Length - 1, 1);
return(sqlWrapper);
}
/// <summary>
/// GroupBy
/// </summary>
/// <param name="expression">表达式树</param>
/// <param name="sqlWrapper">sql包装器</param>
/// <returns>SqlWrapper</returns>
public override SqlWrapper GroupBy(NewArrayExpression expression, SqlWrapper sqlWrapper)
{
for (var i = 0; i < expression.Expressions.Count; i++)
{
SqlExpressionProvider.GroupBy(expression.Expressions[i], sqlWrapper);
sqlWrapper += ",";
}
sqlWrapper.RemoveLast(',');
return(sqlWrapper);
}
/// <summary>
/// GroupBy
/// </summary>
/// <param name="expression">表达式树</param>
/// <param name="sqlWrapper">sql打包对象</param>
/// <returns>SqlWrapper</returns>
public override SqlWrapper GroupBy(ListInitExpression expression, SqlWrapper sqlWrapper)
{
var array = (expression.ToObject() as IEnumerable <object>)?.ToList();
if (array != null)
{
for (var i = 0; i < array.Count; i++)
{
SqlExpressionProvider.GroupBy(Expression.Constant(array[i], array[i].GetType()), sqlWrapper);
}
sqlWrapper.Remove(sqlWrapper.Length - 1, 1);
}
return(sqlWrapper);
}
/// <summary>
/// GroupBy
/// </summary>
/// <param name="expression">表达式树</param>
/// <param name="sqlWrapper">sql打包对象</param>
/// <returns>SqlWrapper</returns>
public override SqlWrapper GroupBy(MemberExpression expression, SqlWrapper sqlWrapper)
{
var tableAlias = string.Empty;
var tableName = string.Empty;
if (expression.Expression.NodeType == ExpressionType.Parameter)
{
var type = expression.Expression.Type != expression.Member.DeclaringType ?
expression.Expression.Type :
expression.Member.DeclaringType;
tableName = sqlWrapper.GetTableName(type);
tableAlias = (expression.Expression as ParameterExpression)?.Name;
}
if (expression.Expression.NodeType == ExpressionType.Constant)
{
tableName = sqlWrapper.GetTableName(sqlWrapper.DefaultType);
}
tableAlias = sqlWrapper.GetTableAlias(tableName, tableAlias);
if (!tableAlias.IsNullOrEmpty())
{
tableAlias += ".";
}
if (expression.Expression.NodeType == ExpressionType.Parameter)
{
sqlWrapper += tableAlias + sqlWrapper.GetColumnInfo(expression.Member.DeclaringType, expression.Member).columnName;
}
if (expression.Expression.NodeType == ExpressionType.Constant)
{
var obj = expression.ToObject();
if (obj != null)
{
var type = obj.GetType().Name;
if (type == "String[]" && obj is string[] array)
{
foreach (var item in array)
{
SqlExpressionProvider.GroupBy(Expression.Constant(item, item.GetType()), sqlWrapper);
}
sqlWrapper.Remove(sqlWrapper.Length - 1, 1);
}
if (type == "List`1" && obj is List <string> list)
{
foreach (var item in list)
{
SqlExpressionProvider.GroupBy(Expression.Constant(item, item.GetType()), sqlWrapper);
}
sqlWrapper.Remove(sqlWrapper.Length - 1, 1);
}
if (type == "String" && obj is string str)
{
SqlExpressionProvider.GroupBy(Expression.Constant(str, str.GetType()), sqlWrapper);
sqlWrapper.Remove(sqlWrapper.Length - 1, 1);
}
}
}
return(sqlWrapper);
}
/// <summary>
/// GroupBy
/// </summary>
/// <param name="expression">表达式树</param>
/// <param name="sqlWrapper">sql打包对象</param>
/// <returns>SqlWrapper</returns>
public override SqlWrapper GroupBy(UnaryExpression expression, SqlWrapper sqlWrapper)
{
SqlExpressionProvider.GroupBy(expression.Operand, sqlWrapper);
return(sqlWrapper);
}