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Codigueando • Ver Tema - evitar que se repita un dato en una columna c#
Índice general Preguntas y respuestas. - Resuelve tus Dudas. C# evitar que se repita un dato en una columna c#

evitar que se repita un dato en una columna c#

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Nota Dom Jun 01, 2014 3:46 pm
Ejrs1990 Aprendiz de programador

Mensajes: 1
estoy haciendo una factura, y tengo un datagrid para ingresar los produtos, lo que quiero es evitar que se ingrese 2 veces un codigo de producto. que antes de ingresarlo lo busque y me devuelva un mensaje diciendo que ya existe, y que pregunte si desea sumar la nueva cantidad al que ya existe. si el usuario respponde si, entonces que sume la nueva cantidad al que ya esxiste, de lo contrario solo limpiar la columna

Nota Dom Jun 01, 2014 4:27 pm
damasta Avatar de Usuario
Site Admin

Mensajes: 343
Cuando hagas el SUBMIT del producto, antes de hacer el INSERT INTO.... haz un SELECT COUNT(), y si ese count te regresa 1, entonces redirige a una pagina donde diga que el producto ya existe, si el select te retorna 0, pues entonces metelo en tu BD. 8-)

http://www.w3schools.com/sql/sql_func_count.asp


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