Since you can cast a spell of standard action or faster and charge, you could channel a spell, charge, and then do the Iaijutsu Strike, if I am reading this all right.
No. Just... no. A charge is a full-round action. The ONLY exception to this is if you are in some way disabled, and can only take one move or standard action in a turn, in which case you are allowed to charge as a special action, but can only move half the distance you normally could. Either way, charging uses up all of your actions for a round.
You can, however, charge a flat-footed opponent, and benefit from Iaijutsu Focus, as long as your DM allows you to draw your weapon as part of the Charge's move (or you do so using the Quickdraw feat).
As for a Duskblade's Arcane Channeling ability, there are exactly two ways in which you can activate it:
1) Channel a touch spell you know into your weapon and then attack with said weapon, all as a standard action (3rd level ability). This can not be combined with a charge, because a charge takes a full-round action, and you therefore do not have a standard action available to use for this purpose.
2) As part of a full-attack action (which is a full-round action), channel a touch spell you know into your weapon, having it affect each target you hit in melee for the round (13th level ability). This also can not be used with a charge, because a full-attack action is a full-round action, and you therefore have no actions remaining to charge.