Make an insert statement function with two parameters name and age
and make statement with select name and age from table
1st statement take data from textbox
insertintotable(textbox1.text,textbox2.text);
and the 2nd statement take data from datatable of select statement
datatable dt=selectnameandage();
then use this ...
datagridview.datasource=dt;
all of that under the save button