How to sort the dropdown list value (static value) in page load in ASP.Net

Hi kishore21,

Refer the below code.

HTML

<div>
    <asp:DropDownList ID="drpimplement" runat="server">
        <asp:ListItem Text="Tractor" Value="Tractor"></asp:ListItem>
        <asp:ListItem Text="Power Tiller" Value="Power Tiller"></asp:ListItem>
        <asp:ListItem Text="Cultivator 9 Tyne" Value="Cultivator 9 Tyne"></asp:ListItem>
        <asp:ListItem Text="Cultivator 5 Tyne" Value="Cultivator 5 Tyne"></asp:ListItem>
        <asp:ListItem Text="Rotavator" Value="Rotavator"></asp:ListItem>
        <asp:ListItem Text="MB Plough (Reversible)" Value="MB Plough (Reversible)"></asp:ListItem>
        <asp:ListItem Text="Disc Plough" Value="Disc Plough"></asp:ListItem>
    </asp:DropDownList>
</div>

Code

protected void Page_Load(object sender, EventArgs e)
{
    SortDDL(ref this.drpimplement);
}

private void SortDDL(ref DropDownList objDDL)
{
    ArrayList textList = new ArrayList();
    ArrayList valueList = new ArrayList();

    foreach (ListItem li in objDDL.Items)
    {
        textList.Add(li.Text);
    }
    textList.Sort();

    foreach (object item in textList)
    {
        string value = objDDL.Items.FindByText(item.ToString()).Value;
        valueList.Add(value);
    }
    objDDL.Items.Clear();

    for (int i = 0; i < textList.Count; i++)
    {
        ListItem objItem = new ListItem(textList[i].ToString(), valueList[i].ToString());
        objDDL.Items.Add(objItem);
    }
}

Output

Cultivator 5 Tyne

Cultivator 9 Tyne

Disc Plough

MB Plough (Reversible)

Power Tiller

Rotavator

Tractor