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Durga Velusamy
NA
318
113.7k
find the error
Apr 15 2015 3:37 AM
The below code does not work. Its shows an error as item collections cannot be modified.
Last 5
th
line error. Why its shows an error?
I have to get the count value of last id +1 on combobox1.when execute the application it create the id but I did not able to get it in combobox1. Please find.
private
void
button2_Click(
object
sender,
EventArgs
e)
{
int
CustomerId=0;
int
i=0;
SqlConnection
con =
new
SqlConnection
(
@"server=CSE-PC; integrated security=true; Database=Bas"
);
con.Open();
SqlCommand
com =
new
SqlCommand
(
"select max(CustomerId) FROM devi"
, con);
if
(com.ExecuteScalar().ToString() ==
""
)
{
CustomerId = 0;
}
else
{
CustomerId =
int
.Parse(com.ExecuteScalar().ToString());
}
if
(CustomerId > 0)
{
CustomerId = CustomerId + 1;
}
else
{
CustomerId = 001;
}
if
(i>0)
{
CustomerId = CustomerId + 1;
}
else
{
CustomerId = 001;
}
comboBox1.Items.Add("CustomerId");
/* collections cannot be modified */
i = i + 1;
MessageBox
.Show(
"IdCreated"
);
con.Close();
}
Reply
Answers (
2
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