Well, there are two options available to you:
Multiclassing: play a swordmage (ensnaring swordmage from AP looks the most controller-y) and take feats to gain wizard spells. This is very costly feat-wise and won't give you that many controller-style tricks.
First you need a feat like Arcane Initiate (PHB). That allows you to use wizard implements (wand, staff, orb, tome) with wizard spells, and allows you to cast a wizard at-will spell 1/encounter.
But now, you need a sword for your swordmage spells, and a wizard implement for any wizard spells you have. This interferes with the Swordmage Warding ability and requires you to have multiple weapons, so you'll want the Arcane Implement Proficiency (AP) feat. That will allow you to use your sword for all of your spells.
Then to get any wizard spells beyond the one at-will, you need the Novice, Acolyte, and Adept Power multiclass feats (PHB). And for all of that, you end up with one wizard at-will (usable 1/encounter), one wizard encounter spell, one wizard daily spell, and one wizard utility spell.
Hybrid: PHB3 and Dragon magazine have introduced rules for characters that are 1/2 of one class and 1/2 of another. A hybrid swordmage/wizard doesn't have all the swordmage or all the wizard class abilities, but has an even split of powers and can use one weapon to cast all of its spells without any feats. This is probably the way to go for what you want.
Here's an example hybrid:
====== Created Using Wizards of the Coast D&D Character Builder ======
level 10
Human, Swordmage|Wizard
Swordmage Aegis (Hybrid): Aegis of Ensnarement
Hybrid Talent: Swordmage Warding
FINAL ABILITY SCORES
Str 12, Con 16, Dex 11, Int 20, Wis 13, Cha 10.
STARTING ABILITY SCORES
Str 12, Con 14, Dex 11, Int 16, Wis 13, Cha 10.
AC: 28 Fort: 21 Reflex: 24 Will: 21
HP: 78 Surges: 10 Surge Value: 19
TRAINED SKILLS
History +15, Endurance +13, Athletics +11, Arcana +15
UNTRAINED SKILLS
Acrobatics +5, Bluff +5, Diplomacy +5, Dungeoneering +6, Heal +6, Insight +6, Intimidate +5, Nature +6, Perception +6, Religion +10, Stealth +5, Streetwise +5, Thievery +5
FEATS
Human: Hybrid Talent
Level 1: Armor Proficiency (Leather)
Level 2: Intelligent Blademaster
Level 4: Grasping Ensnarement
Level 6: Toughness
Level 8: Weapon Focus (Heavy Blade)
Level 10: Focused Expertise (Longsword)
POWERS
Bonus At-Will Power: Thunderwave
Hybrid at-will 1: Booming Blade
Hybrid at-will 1: Scorching Burst
Hybrid encounter 1: Burning Hands
Hybrid daily 1: Flaming Sphere
Hybrid utility 2: Price of Ensnarement
Hybrid encounter 3: Shadow Snake Lunge
Hybrid daily 5: Elemental Foible
Hybrid utility 6: Dimension Door
Hybrid encounter 7: Winter's Wrath
Hybrid daily 9: Wall of Fire
Hybrid utility 10: Mass Resistance
ITEMS
Adventurer's Kit, Challenge-Seeking Longsword +3, Cape of the Mountebank +2, Circlet of Arcane Extension (heroic tier), Boots of Jaunting (heroic tier), Gauntlets of Arcane Might (heroic tier), Warded Vambraces (heroic tier), Longsword of Arcane Bonds +2, Summoned Drowmesh +3, Crossbow
====== Copy to Clipboard and Press the Import Button on the Summary Tab ======
edit: whoops, missed the bit about being a half-elf!