how to remove this error "system..data.datrowview "in comboox.?

Can you give the information about the total error which you are getting??

G. S.
.Net Developer

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when page is load then in combobox have item name syastem.data.datarow view plce on items..?????

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You can clear all the items from the combobox when the page loads for the 1st time using IsPostback and when the page is added for the postback then retain the previous value of the ComboBox.

G. S.
.Net Developer

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but in windows form haven't "is post back".and when form load i use "cmb_country.item.clear".but it is not working.

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Ohk you are using Windows form, please give the total code which you are writing in your application. So that i can go through the exact error which you are facing.

G. S.
.Net Developer

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private void Frm_District_Master_Load(object sender, EventArgs e)
{
try
{
cmb_country.Items.Clear();
FillCountry();
}
catch

{
}
this is code..

public void FillCountry()
{
DataTable dt = new DataTable();
cmb_country.Items.Clear();
dt = cn.getvalues("select countryid,countryname from tbl_country");

cmb_country.DataSource = dt;
cmb_country.ValueMember = "countryid";
cmb_country.DisplayMember = "countryname";
cmb_country.SelectedIndex = -1;
FillState();
}
public void FillState()
{
cmb_country.DisplayMember = "";
DataTable dt = new DataTable();

dt = cn.getvalues("select stateid,statename from tbl_state where countryid ='" + cmb_country.SelectedValue +"' ");
cmb_statename.DataSource = dt;

cmb_statename.ValueMember = "stateid";
cmb_statename.DisplayMember = "statename";

cmb_statename.SelectedIndex = -1;

}

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@Gopesh Sharma
wt happend gopesh plz give me reply..:)

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Try this...

comboBox1.Items.Clear();

               comboBox1.Text = "Select State";

                try

                {

                    conn.Open();

                    str1 = "select distinct StateID from State";

                    cmd = new SqlCommand(str1, conn);

                    SqlDataReader dr = cmd.ExecuteReader();

                    while (dr.Read())

                    {

                        comboBox1.Items.Add(dr[0]);

                    }



                    dr.Close();

G. S.
.Net Developer

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