Hai Friends I Have A Question On Asp Drop Down List

Question

1.00/5 (1 vote)

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ASP.NET

C#3.5

Binding

, +

i'll bind the data from databse to dropdownlist

like

C#

string query = "SELECT id code,country DESCRIPTION description FROM world";
            OracleDataAdapter adpt = new OracleDataAdapter(query, con);
            DataTable dt = new DataTable();
            adpt.Fill(dt);
            DataRow dr = dt.NewRow();
            dr["code"] = 0;
            dr["description"] = "-Select-";
            dt.Rows.InsertAt(dr, 0);
            ddlcounry.DataSource = dt;
            ddlcounry.DataBind();
            ddlcounry.DataTextField = "description";
            ddlcounry.DataValueField = "code";
            ddlcounry.DataBind();

and in aspx page

XML

<asp:DropDownList ID="ddlcounry" runat="server" Style="font-size: medium; font-family: 'Times New Roman', Times, serif"
                        TabIndex="1" Width="158px" CssClass="Dropdown">
                    </asp:DropDownList>
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="ddlcounry"
                        InitialValue="0" runat="server" ErrorMessage="Please select ddlcounry"></asp:RequiredFieldValidator>

when ever i click on savebtn if dropdownlist have -select- it will show alert message
please tell me thankssss

Posted 22-Feb-15 19:58pm

Parazival

Updated 22-Feb-15 21:25pm

v8

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Comments

[no name] 23-Feb-15 2:03am

What u need ? do u wanted to ask "please select the data after the button click"?

Maciej Los 23-Feb-15 2:04am

Not clear what you want to achieve...

Parazival 23-Feb-15 2:17am

rajeesh

after button click if dropdownlist had -select- it will show Please select the data

4 solutions

Solution 1

set tht initialvalue ='-Select-*'
like below

XML

<asp:DropDownList ID="ddlcounry" runat="server" Style="font-size: medium; font-family: 'Times New Roman', Times, serif"
                        TabIndex="1" Width="158px" CssClass="Dropdown">
                    </asp:DropDownList>
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="ddlcounry"
                        InitialValue="-Select-*" runat="server" ErrorMessage="Please select ddlcounry"></asp:RequiredFieldValidator>

Posted 22-Feb-15 20:25pm

Tushar sangani

Solution 3

Try this:

C#

<asp:requiredfieldvalidator id="RequiredFieldValidator1" controltovalidate="ddlcounry" xmlns:asp="#unknown">
                      InitialValue="0"  InitialValue="-Select-" runat="server" ErrorMessage="Please select ddlcounry"></asp:requiredfieldvalidator>

Your Initial value must be '-Select-'

Posted 22-Feb-15 20:31pm

King Fisher

Updated 22-Feb-15 20:32pm

v2

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RajeeshMenoth · Accepted Answer · 2015-02-22T20:26:00

Solution 2

ASP.NET

<asp:requiredfieldvalidator id="RequiredFieldValidator1" runat="server" errormessage="Please select the data" controltovalidate="ddlcounry" initialvalue="-Select-" ></asp:requiredfieldvalidator>

In ur ddl code add this one :

C#

ddlcountry.Items.Insert(0, "-Select-");

Posted 22-Feb-15 20:26pm

RajeeshMenoth

Updated 22-Feb-15 20:27pm

v3

Comments

Parazival 23-Feb-15 3:13am

k k when ever i click on save btn it will show alert box please send me the code also in .cs file

[no name] 23-Feb-15 3:34am

which code? saving? after the save code u just put a lable.
Eg: lbl_msg.text = "saved";

Parazival 23-Feb-15 3:50am

in my btn_click()
{
string confirmValue = Request.Form["confirm_value"];
if (confirmValue == "Yes")
{

this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked YES!')", true);
}
else
{
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked NO!')", true);
}
}

if i click on yes it will check dropdownlist
and if user select -Select- this it will show alert box ...
how to write the code for this

[no name] 23-Feb-15 3:54am

When u click on the save button u wanted to show a confirm msg alert?

[no name] 23-Feb-15 4:05am

if (ddlcountry.SelectedItem.ToString() == "-Select-")
{

this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked YES!')", true);
}
else
{
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked NO!')", true);
}

Parazival 23-Feb-15 4:17am

thank u so much

Dusara Maulik · Accepted Answer · 2015-02-22T20:59:00

Solution 4

Hi,

Try below solution:

ASPX HTML:

XML

<asp:DropDownList runat="server" ID="ddlList" CssClass="form-control"> </asp:DropDownList>
<asp:RequiredFieldValidator Display="Dynamic" ID="RequiredFieldValidator3" ErrorMessage="Please select from the list." InitialValue="" ControlToValidate="ddlList" runat="server" />

Code

SQL

ddlList.DataSource = objSource;
ddlList.DataTextField = "Description";
ddlList.DataValueField = "Code";
ddlList.DataBind();

ListItem liSelect = new ListItem();
liSelect.Text = "--- Please Select ---";
liSelect.Value = "";

ddlList.Items.Insert(0, liSelect);

This is fully working code.

Posted 22-Feb-15 20:59pm

Dusara Maulik

Updated 22-Feb-15 21:34pm

v2

Comments

Parazival 23-Feb-15 3:31am

haii dusara
thanksss
what is ddlgener

Dusara Maulik 23-Feb-15 3:34am

Ohhh, use below instead:

ddlList.DataSource = objSource;

Parazival 23-Feb-15 3:44am

in my btn_click()
{
string confirmValue = Request.Form["confirm_value"];
if (confirmValue == "Yes")
{

this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked YES!')", true);
}
else
{
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked NO!')", true);
}
}

if i click on yes it will check dropdownlist
and if user select -Select- this it will show alert box ...
how to write the code for this

Dusara Maulik 23-Feb-15 3:56am

pls share what you had done in HTML and code behind.

Parazival 23-Feb-15 4:18am

k k i got it thank u so much for ur help

[no name] 23-Feb-15 4:22am

welcome :) ,if u get the solution please close or accept the answer.