dbedit calculation problem

stevevai

Write this:
if (DBEdit1.Field.IsNull) Or (DBEdit2.Field.IsNull) then
DBedit3.text: = '0'
else dbedit3.Text: = floattostr (strtofloat (dbedit1.Text) * strtofloat (dbedit2.Text));

stevevai

You are using DBedit, which is connected with the database fields. See what the field values ​​in the database are,

zxchy135

I clicked adoquery.append after adding data, and he gave an error. Is it empty when I add a new record field?

stevevai

Didn't I write the code for you?
Write this:
if (DBEdit1.Field.IsNull) Or (DBEdit2.Field.IsNull) then
DBedit3.text: = '0'
else dbedit3.Text: = floattostr (strtofloat (dbedit1.Text) * strtofloat (dbedit2.Text));

zxchy135

I wrote it upstairs. Is it related to the data I added to aoquerynewrecord?

lazying

Use Edit

stevevai

Do you still report this error?

zxchy135

Only use edit

stevevai

No problem, I tested it, it's normal,

stevevai

May be your DBEdit3 is copied from DBedit2, onchange event to see if it is only executed by DBEdit2