Selected Values in a combobox is not reading

Question

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C#

cmd = new SqlCommand("select intrfacname from transfer where ipad='" + comboBox2.SelectedItem.ToString() + "'", cn.con);
dr1 = cmd.ExecuteReader();
while (dr1.Read())
{
    textBox2.Text = dr1[0].ToString();
}
dr1.Dispose();
cmd.Dispose();

Am Selecting the combo box value and read into an text box but value of that selected index is not reading in a string Before dis code i bind the values in combo box the code for that is here but it works

C#

 private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
  cmd = new SqlCommand("select ipad from transfer where ntwrk='" + comboBox1.SelectedItem.ToString() + "'", cn.con);
            

            dr = cmd.ExecuteReader();
            DataTable dt = new DataTable();

            dt.Columns.Add("ipad", typeof(string));
           // dt.Columns.Add("contactname", typeof(string));
            dt.Load(dr);

            comboBox2.ValueMember = "ipad";
            comboBox2.DisplayMember = "ipad";
            comboBox2.DataSource = dt;
            cmd.Dispose();
            dr.Dispose();
}

But the above code for reading a value does not work help me pls

Posted 3-Jul-13 18:55pm

usha C

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praks_1 · Accepted Answer · 2013-07-03T19:38:00

Solution 4

Hi,
try this:
comboBox1.GetItemText(comboBox1.SelectedItem);

Posted 3-Jul-13 19:38pm

praks_1

Comments

usha C 4-Jul-13 1:40am

Thanks lot it Works

**Nirav Prabtani** · Accepted Answer · 2013-07-03T19:31:00

Solution 3

Try this....:)

C#

cmd = new SqlCommand("select intrfacname from transfer where ipad='" + comboBox2.SelectedItem.ToString() + "'", cn.con);
         dr1 = cmd.ExecuteReader();
         while (dr1.Read())
         {
             textBox2.Text = dr1[0]["intrfacname"].ToString();
         }
         dr1.Dispose();
         cmd.Dispose();

Posted 3-Jul-13 19:31pm

Nirav Prabtani

Comments

usha C 4-Jul-13 1:35am

"Cannot apply indexing with [] to an expression of type 'object'" Am getting this eddror

praks_1 · Accepted Answer · 2013-07-03T19:25:00

Solution 2

Hi,
you can try this:
comboBox1.SelectedValue.ToString();

Posted 3-Jul-13 19:25pm

praks_1

Comments

usha C 4-Jul-13 1:30am

But i need only cmbobox 2 value and not the 1

praks_1 4-Jul-13 1:37am

comboBox1.GetItemText(comboBox1.SelectedItem);

**Nirav Prabtani** · Accepted Answer · 2013-07-03T19:02:00

Just Update itlike that....:)

C#

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
  cmd = new SqlCommand("select ipad from transfer where ntwrk='" + comboBox1.SelectedItem.ToString() + "'", cn.con);
            
 
            dr = cmd.ExecuteReader();
            DataTable dt = new DataTable();
 
            dt.Columns.Add("ipad", typeof(string));
           // dt.Columns.Add("contactname", typeof(string));
            dt.Load(dr);
 
            comboBox2.DataSource = dt;
            comboBox2.ValueMember = "ipad";
            comboBox2.DisplayMember = "ipad";
           
            cmd.Dispose();
            dr.Dispose();
}

Selected Values in a combobox is not reading

4 solutions

Solution 4

Solution 3

Solution 2

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