Combo Box Text changed event

Question

1.00/5 (1 vote)

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Hi,

I have a combo box (cmbBatchNo) in which I can load the list of items. When we select one item in list of items then Selectedindexchanged event is fired and if I enter new number in the combo box then the text changed event is fired and disables the expdate, MRP textboxes but here its not fire.

Please help me.

C#

public void cmbBatchno_SelectedIndexChanged(object sender, EventArgs e)
    {

        if (ViewState["BatchNo"] != null)
        {
            DataTable dtBatchNoDtls = (DataTable)ViewState["BatchNo"];
            for (int i = 0; i < dtBatchNoDtls.Rows.Count; i++)
            {
                if (dtBatchNoDtls.Rows[i]["BatchNo"].ToString() == cmbBatchno.Text)
                {
                    txtExpdate.Text = dtBatchNoDtls.Rows[i]["ExpDate"].ToString();
                    txtMRP.Text = dtBatchNoDtls.Rows[i]["MRP"].ToString();
                    txtRate.Text = dtBatchNoDtls.Rows[i]["Rate"].ToString();
                    if (txtExpdate.Text != "")
                        txtPacks.Focus();
                    else
                        txtExpdate.Focus();
                    break;
                }
                else
                {
                    txtExpdate.Text = string.Empty;
                    txtMRP.Text = "";
                    txtRate.Text = "";
                }
            }
        }
    }

    public void cmbBatchno_TextChanged(object sender, EventArgs e)
    {
        if (ViewState["BatchNo"] != null)
        {
            DataTable dtBatchNoDtls = (DataTable)ViewState["BatchNo"];
            for (int i = 0; i < dtBatchNoDtls.Rows.Count; i++)
            {
                if (cmbBatchno.Text == dtBatchNoDtls.Rows[i]["BatchNo"].ToString())
                {
                    txtExpdate.Enabled = false;
                    txtMRP.Enabled = false;
                    break;
                }
                else
                {
                    txtExpdate.Enabled = true;
                    txtMRP.Enabled = true;
                }
            }
               
        }
    

    }

Posted 18-Oct-13 23:44pm

MANI 14

Updated 18-Oct-13 23:46pm

André Kraak

v3

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Ank_ush · Answer 1 · 2013-10-20T19:09:00

Solution 1

The code you have written in cmbBatchno_TextChanged event is that if the value selected in cmbBatchno(combobox) matches with the number from retrieved data, then it will disable the textbox.
see your code

C#

if (cmbBatchno.Text == dtBatchNoDtls.Rows[i]["BatchNo"].ToString())
{
    txtExpdate.Enabled = false;
    txtMRP.Enabled = false;
    break;
}

you have written

C#

txtExpdate.Enabled = false;

which disables the textbox. if you want that the textbox should not be disabled then make it true instead of false in if condition. like this

txtExpdate.Enabled = true;

Any help needed plz reply.

Posted 20-Oct-13 19:09pm

Ank_ush

Comments

MANI 14 21-Oct-13 2:23am

k but cmbBatchno_TextChanged is not executed when changed the text in comboBox(cmbbatchno) is there any wrong.. pls help me

Ank_ush 21-Oct-13 12:43pm

select thecmbBatchno(combobox) on form, go to properties and check the text_changed event, is it empty or filled, if it's empty then write the same code again for the Text_Changed event, even if it's not empty still delete the event and write the same code again

MANI 14 22-Oct-13 0:40am

if u dnt mine show me one example pls