protected override SqlBuilder Select(NewExpression expression, SqlBuilder sqlBuilder)
{
for (int i = 0; i < expression.Arguments.Count; i++)
{
var argument = expression.Arguments[i];
var mermberExpression = ((MemberExpression)argument);
PropertyInfo property = mermberExpression.Member as PropertyInfo;
//排除非数据列
if (property.IsNotColumn(mermberExpression.Expression.Type))
{
continue;
}
SqlProvider.Select(argument, sqlBuilder);
var fieldName = expression.Members[i].Name;
sqlBuilder.SelectFieldsAlias.Add($"[{fieldName}]");
}
return(sqlBuilder);
}
protected override SqlBuilder Select(ParameterExpression expression, SqlBuilder sqlBuilder)
{
SqlProvider.Select(expression, sqlBuilder);
return(sqlBuilder);
}
protected override SqlBuilder OrderBy(ParameterExpression expression, SqlBuilder sqlBuilder)
{
SqlProvider.OrderBy(expression, sqlBuilder);
return(sqlBuilder);
}
protected override SqlBuilder Where(ParameterExpression expression, SqlBuilder sqlBuilder)
{
SqlProvider.Where(expression, sqlBuilder);
return(sqlBuilder);
}
protected override SqlBuilder Max(UnaryExpression expression, SqlBuilder sqlBuilder)
{
SqlProvider.Max(expression.Operand, sqlBuilder);
return(sqlBuilder);
}
protected override SqlBuilder ThenByDescending(UnaryExpression expression, SqlBuilder sqlBuilder)
{
SqlProvider.ThenByDescending(expression.Operand, sqlBuilder);
return(sqlBuilder);
}
private static void InnerIn(MethodCallExpression expression, SqlBuilder sqlBuilder)
{
SqlProvider.Where(expression.Arguments[0], sqlBuilder);
sqlBuilder.SqlWhereStr += " in";
SqlProvider.In(expression.Arguments[1], sqlBuilder);
}
protected override SqlBuilder Where(BinaryExpression expression, SqlBuilder sqlBuilder)
{
bool hasHandle = false;
if (CheckMemberIsNotColumn(expression, sqlBuilder))
{
return(sqlBuilder);
}
//添加Where表达式左侧sql
if (IsNeedsParentheses(expression, expression.Left))
{
sqlBuilder.SqlWhereStr += "(";
}
if (expression.Left is MemberExpression && expression.Left.Type == typeof(bool) && expression.Left.NodeType == ExpressionType.MemberAccess && (expression.NodeType == ExpressionType.AndAlso || expression.Right is ConstantExpression))
{
//解析（m=>m.IsAdmin)
var memberExpression = expression.Left as MemberExpression;
var tableName = memberExpression.Member.DeclaringType.GetTableName(sqlBuilder._dbSqlParser);
sqlBuilder.SetTableAlias(tableName);
string tableAlias = sqlBuilder.GetTableAlias(tableName);
if (!string.IsNullOrWhiteSpace(tableAlias))
{
tableAlias += ".";
}
//添加参数
var dbParamName = string.Empty;
if (expression.Right is ConstantExpression)
{
hasHandle = true;
var value = Convert.ToBoolean(((ConstantExpression)expression.Right).Value) ? 1 : 0;
dbParamName = sqlBuilder.AddDbParameter(value);
}
else
{
dbParamName = sqlBuilder.AddDbParameter(1);
}
//添加关联条件
sqlBuilder.SqlWhereStr += " " + tableAlias + memberExpression.Member.Name;
sqlBuilder.SqlWhereStr += " = ";
sqlBuilder.SqlWhereStr += $"{dbParamName}";
}
else
{
SqlProvider.Where(expression.Left, sqlBuilder);
}
if (IsNeedsParentheses(expression, expression.Left))
{
sqlBuilder.SqlWhereStr += ")";
}
if (!hasHandle)
{
//添加Where操作符
var whereOperator = " =";
if ((expression.Right is ConstantExpression) && ((ConstantExpression)expression.Right).Value == null)
{
whereOperator = OperatorParser(expression.NodeType, true);
}
else
{
whereOperator = OperatorParser(expression.NodeType);
}
sqlBuilder.SqlWhereStr += $"{whereOperator}";
//添加Where表达式右侧sql
if (IsNeedsParentheses(expression, expression.Right))
{
sqlBuilder.SqlWhereStr += "(";
}
if (expression.Right is MemberExpression && expression.Right.Type == typeof(bool) && expression.Right.NodeType == ExpressionType.MemberAccess && expression.NodeType == ExpressionType.AndAlso)
{
//解析（m=>m.IsAdmin)
var memberExpression = expression.Right as MemberExpression;
var tableName = memberExpression.Member.DeclaringType.GetTableName(sqlBuilder._dbSqlParser);
sqlBuilder.SetTableAlias(tableName);
string tableAlias = sqlBuilder.GetTableAlias(tableName);
if (!string.IsNullOrWhiteSpace(tableAlias))
{
tableAlias += ".";
}
//添加参数
var dbParamName = sqlBuilder.AddDbParameter(1);
//添加关联条件
sqlBuilder.SqlWhereStr += " " + tableAlias + memberExpression.Member.Name;
sqlBuilder.SqlWhereStr += " = ";
sqlBuilder.SqlWhereStr += $"{dbParamName}";
}
else
{
SqlProvider.Where(expression.Right, sqlBuilder);
}
if (IsNeedsParentheses(expression, expression.Right))
{
sqlBuilder.SqlWhereStr += ")";
}
}
return(sqlBuilder);
}
