About how to cancel the way that calm field tie ties in Datagridview?

There is a Datagridview to bind in the program that I make decided a Dataset, among them one allows amount to word only, bind letter of decided this input in the row in Datagridview so, leave focal travel next, he recovers original cost automatically, I do not want to call him to restore automatically now, do I think I do processing? How should install? Ask everybody to help look, thankDo not bind calmIs there other measure? Type changing a line is String, check in Detail_CellValidating and Detail_CellValidated when the inputCan not transform the type of database field, the property that passes setting Datagrid however or incident will come true. Have a person to know ah tell the following ahHave a person to know
Another kind of method:
Add a TextBox, the needs judgement kind that judges a mouse to click some to go, indication TextBox accepts an input, of judgement is the value inside TextBox, qualification assigns again the Cell of DataGridView

Such doing----Still be inferior to be not being bound calm, ahIf input,I think namely now 2, 222, 222.123 think the input is correct