How Do I Handle This Error

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how can i handle this error ("An explicit value for the identity column in table 'appointment' can only be specified when a column list is used and IDENTITY_INSERT is ON.")

Posted 1-May-15 2:12am

Atta Ur Rahman 118

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CHill60 1-May-15 8:22am

~~Share that caused the error.~~ Share the code that caused the error
You have a column on your table defined as IDENTITY but you are trying to assign an explicit value to it in your code.

ZurdoDev 1-May-15 8:23am

That IS the answer.

Herman<T>.Instance 1-May-15 8:28am

it is as easy as that

Atta Ur Rahman 118 1-May-15 8:49am

private void bt_requesting_Click(object sender, EventArgs e)
{
string requestappoint = combo_requstinpersonappoint.SelectedItem.ToString();
string requestpersonname = tb_requestingpersnname.Text.Trim();
string relation = tb_relation.Text.Trim();
string patientname = tb_patntnmae.Text.Trim();
string adres = tb_address.Text.Trim();
string city = tb_city.Text.Trim();
string cell = tb_cell.Text.Trim();
string patienttype = comboBox_patienttype.SelectedItem.ToString();
string apointtype = comboBox_appointtype.SelectedItem.ToString();
DateTime date = DateTime.Parse(desirdate.EditValue.ToString());
DateTime time = DateTime.Parse(desiretime.EditValue.ToString());
string insert = string.Format("insert into appointment values ('{0}','{1}','{2}','{3}','{4}','{5}','{6}','{7}','{8}','{9}','{10}')", requestappoint, requestpersonname, relation, patientname, adres, city, cell, patienttype, patienttype, desirdate, desiretime);
SqlCommand cmd = new SqlCommand(insert, dbcs.open());
cmd.ExecuteNonQuery();
MessageBox.Show("Request Complete");
}

Code is this

Atta Ur Rahman 118 1-May-15 8:50am

private void bt_requesting_Click(object sender, EventArgs e)
{
string requestappoint = combo_requstinpersonappoint.SelectedItem.ToString();
string requestpersonname = tb_requestingpersnname.Text.Trim();
string relation = tb_relation.Text.Trim();
string patientname = tb_patntnmae.Text.Trim();
string adres = tb_address.Text.Trim();
string city = tb_city.Text.Trim();
string cell = tb_cell.Text.Trim();
string patienttype = comboBox_patienttype.SelectedItem.ToString();
string apointtype = comboBox_appointtype.SelectedItem.ToString();
DateTime date = DateTime.Parse(desirdate.EditValue.ToString());
DateTime time = DateTime.Parse(desiretime.EditValue.ToString());
string insert = string.Format("insert into appointment values ('{0}','{1}','{2}','{3}','{4}','{5}','{6}','{7}','{8}','{9}','{10}')", requestappoint, requestpersonname, relation, patientname, adres, city, cell, patienttype, patienttype, desirdate, desiretime);
SqlCommand cmd = new SqlCommand(insert, dbcs.open());
cmd.ExecuteNonQuery();
MessageBox.Show("Request Complete");
}
code is this.
I think the error is in this line (DateTime time = DateTime.Parse(desiretime.EditValue.ToString());)

CHill60 1-May-15 11:02am

If you use your debugger you will see quite clearly which line throws the error - probably cmd.ExecuteNonQuery();. Examine your database schema, find the IDENTITY column on the table [appointment] and remove it from the insert into appointment... string in the code.

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CHill60 · Accepted Answer · 2015-05-01T02:35:00

You have a column on your table [appointment] which has been defined as IDENTITY but in your code you are attempting to assign an explicit value to it.

Don't - the whole point of IDENTITY columns is that the database will generate those values for you.

An example:

SQL

create table Demo
(
	myID int IDENTITY(1,1),
	otherData varchar(30)
)

If I attempt to put data into that table using this

SQL

insert into Demo values
(1,'first datum'),
(2,'second datum'),
(3,'third datum')

then I will get an error reported

Quote:
Msg 8101, Level 16, State 1, Line 1
An explicit value for the identity column in table 'Demo' can only be specified when a column list is used and IDENTITY_INSERT is ON.

Instead, I need to use

SQL

insert into Demo values
('first datum'),
('second datum'),
('third datum')

then when I select I get

myId    otherData
1	first datum
2	second datum
3	third datum