Hi, Here in this asp.net tutorials we are going to learn how to add new Item in DropDownList Control from TextBox Control while clicking the Button Control in asp.net with C#.
First we design the ASP.Net web form with one TextBox Control, one DropDownLinst Control and one Button Control.
The HTML Design code for asp.net web form is like:
<table>
<tr>
<td style=”width: 100px; text-align: right”>
Enter Value :</td>
<td style=”width: 100px”>
<asp:TextBox ID=”txtvalue” runat=”server”></asp:TextBox></td>
</tr>
<tr>
<td style=”width: 100px; text-align: right”>
</td>
<td style=”width: 100px; text-align: left”>
<asp:Button ID=”btnadd” runat=”server” Font-Bold=”True” Height=”32px” OnClick=”btnadd_Click”
Text=”ADD” Width=”80px” /></td>
</tr>
<tr>
<td style=”width: 100px; height: 6px; text-align: right”>
Value :</td>
<td style=”width: 100px; height: 6px; text-align: left”>
<asp:DropDownList ID=”Drpvalue” runat=”server” Width=”128px”>
</asp:DropDownList></td>
</tr>
<tr>
<td style=”width: 100px; text-align: right”>
</td>
<td colspan=”1″ style=”text-align: left”>
<asp:Label ID=”Label1″ runat=”server” Font-Bold=”True”></asp:Label></td>
</tr>
</table>
The asp.net web form out put is:
Now, write the below code on Button control click event for add items to DropDownList control from TextBox Control in ASP.Net.
protected void btnadd_Click(object sender, EventArgs e)
{
if (txtvalue.Text == “”)
{
Label1.Text = “Enter Value !!”;
txtvalue.Focus();
}
else
{
Drpvalue.Items.Add(txtvalue.Text);
Label1.Text = “Item Added Successfully !!”;
}
}
The out put of asp.net example of dropdownlist control is:
I hope this asp.net example of add new item in DropDownList from TextBox on Button Click event will help you…..