please i have problem when i press button to redisplay data error message called (this causes two binding in the collection to bind the same property)

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this is code under button in form

C#

con = new SqlConnection(str);
            con.Open();
            string combined = "select code_customer,insurance_type,branch_name,name,address,insurance_cost,record_date  from customers,branches,insurance_type where branches.code_branch=customers.code_branch and insurance_type.code_type=customers.code_type";
            dset = new DataSet();
            da = new SqlDataAdapter(combined, con);
            da.Fill(dset, "customers");
            builder = new SqlCommandBuilder(da);            
            dataGridView1.DataSource = dset.Tables["customers"];
            comboBox1.DataSource = dset.Tables["customers"];
            comboBox1.DisplayMember = "insurance_type";
            comboBox2.DataSource = dset.Tables["customers"];
            comboBox2.DisplayMember = "branch_name";
            textBox1.DataBindings.Add("Text",dset.Tables["customers"], "name");
            textBox2.DataBindings.Add("Text",dset.Tables["customers"], "address");
            textBox3.DataBindings.Add("Text",dset.Tables["customers"], "insurance_cost");
            dateTimePicker1.DataBindings.Add("value", dset.Tables["customers"], "record_date");

Posted 4-Dec-11 3:46am

mhassan083

Updated 4-Dec-11 3:48am

Mehdi Gholam

v2

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**Manoj K Bhoir** · Answer 1 · 2011-12-04T04:01:00

It is because you are binding your controls on Button Click Event.When you click Button then your Controls are bind with your DataSet Tables and when you press this Button Second time your code will try to Bind this control with DataSet again which will give you error.Try to write the code you used for binding the Controls in Form_Load Event then it will bind controls when form gets loaded.

See this link to know more about DataBinding :
http://msdn.microsoft.com/en-us/library/ms752347.aspx[^]
http://msdn.microsoft.com/en-us/library/cc278072(v=vs.95).aspx[^]

So do one thing Add this code before your code :

C#

textBox1.DataBindings.Clear();
textBox2.DataBindings.Clear();
textBox3.DataBindings.Clear();
dateTimePicker1.DataBindings.Clear();

It will clear your old bindings when your press Button.
I hope it will help you. :)