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1
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Items collection cannot be modified when the DataSource prop
ahmed salah
Feb 6 2017 9:43 AM
271
Reply
I have two windows form
error show when i need to pass data from windows form2 in textbox
to windows form1 combobox
First windows Form
found combobox inside windows form1 and I show data in it in load event of form
public
DataTable ShowExceltwoLanguage()
{
OleDbConnection con =
new
OleDbConnection(connection);
con.Open();
string
str =
"select MemberID,MemberNameAR + ' - ' + MemberNameEN as MemberName from [MemberAR$]"
;
OleDbCommand com =
new
OleDbCommand();
com =
new
OleDbCommand(str, con);
OleDbDataAdapter oledbda =
new
OleDbDataAdapter();
oledbda =
new
OleDbDataAdapter(com);
DataSet ds =
new
DataSet();
ds =
new
DataSet();
oledbda.Fill(ds,
"[MemberAR$]"
);
con.Close();
DataTable dt =
new
DataTable();
dt = ds.Tables[
"[MemberAR$]"
];
return
dt;
}
in
load
event
of windows form1 i write
as
following
QrClasses qrc =
new
QrClasses();
DataTable dt = qrc.ShowExceltwoLanguage();
comboBox4.DataSource = dt;
comboBox4.DisplayMember =
"MemberName"
;
comboBox4.ValueMember =
"MemberID"
;
Second windows form
here is error
Items collection cannot be modified when the DataSource property is set show
in button1 of form2 click event
if
(!
string
.IsNullOrWhiteSpace(textBox1.Text))
{
var cb = ((Form1)Owner).comboBox4;
var index = cb.FindString(textBox1.Text);
if
(index == -1)
{
cb.Items.Add(textBox1.Text);
// in this line Additional information: Items collection cannot be modified when the DataSource property is set.
index = cb.FindString(textBox1.Text);
if
(index > -1)
{
cb.SelectedIndex = index;
Close();
}
}
else
{
cb.SelectedIndex = index;
}
}
so that how to solve this problem if possible?
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