how to asssign string variable to SqlDbType

i have string variable as,

String str="Int";

now, while assigning sql parameters, i want

param.SqlDBType=SqlDBType.Int;

but, value of Int is dynamic. it may be string or double so,

i want it to be as,

param.SqlDBType=(SqlDBType)str;

but its not acceptable(its invalid cast).

in any way can i do it and how?

regards--

The SqlDBType is not the value you are passing to the database, rather it is the data type. Therefore this must match that of your table column data type.

If your column is a varchar you would assign SqlDBType.Varchar or of it is an Int you would assign SqlDBType.Int.

To assign the actual value to the parameter you use the Value property.

e.g. param.Value = <the value you want to assign to the parameter>