In this article I will explain with an example, how to get the selected Text and Value of DropDownList inside SelectedIndexChanged event in ASP.Net using C# and VB.Net.
Inside the SelectedIndexChanged event, the selected Text and Value of ASP.Net DropDownList will be displayed in JavaScript Alert Message Box using C# and VB.Net.
HTML Markup
The HTML Markup consists of an ASP.Net DropDownList specified with OnSelectedIndexChanged event handler and AutoPostBack property set to True.
<asp:DropDownList ID="ddlFruits" runat="server" AutoPostBack = "true" OnSelectedIndexChanged = "OnSelectedIndexChanged">
<asp:ListItem Text="Mango" Value="1" />
<asp:ListItem Text="Apple" Value="2" />
<asp:ListItem Text="Banana" Value="3" />
<asp:ListItem Text="Guava" Value="4" />
<asp:ListItem Text="Orange" Value="5" />
</asp:DropDownList>
The SelectedIndexChanged event of ASP.Net DropDownList
When an item is changed in ASP.Net DropDownList, the following OnSelectedIndexChanged event handler is executed.
Inside the event handler, the selected Text and Value of the DropDownList Selected Item is fetched and displayed using JavaScript Alert message box.
C#
protected void OnSelectedIndexChanged(object sender, EventArgs e)
{
string message = ddlFruits.SelectedItem.Text + " - " + ddlFruits.SelectedItem.Value;
ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('" + message + "');", true);
}
VB.Net
Protected Sub OnSelectedIndexChanged(sender As Object, e As EventArgs)
Dim message As String = ddlFruits.SelectedItem.Text & " - " & ddlFruits.SelectedItem.Value
ClientScript.RegisterStartupScript(Me.GetType(), "alert", "alert('" & message & "');", True)
End Sub
Screenshot
![Get Selected Text and Value inside DropDownList SelectedIndexChanged event in ASP.Net]()
Demo
Downloads
