CODEWITHSUNDEEP
asp.net
user2550275
user2550275

Reputation:

Displaying selected items in dropdowns to a grid view

I have 3 dropdowns. when selecting an item from first ddl,second ddl generated with respective items. When selecting second ddl,third ddl generated with respective data. My problem is that when selecting an item from third ddl, 3 items(selected item of 1 ddl,selected item of 2 ddl,selected item of 3 ddl) need to display in a grid view. How to achieve that? aspx page:

  <body>
<form id="form1" runat="server">
<asp:DropDownList ID="DDLCountry" runat="server" OnSelectedIndexChanged="DDLCountry_SelectedIndexChanged" AutoPostBack="true">
    <asp:ListItem>--Select-- </asp:ListItem>
    <asp:ListItem>India</asp:ListItem>

    <asp:ListItem>Australia</asp:ListItem>
    <asp:ListItem>Pakistan</asp:ListItem>

</asp:DropDownList>
<asp:DropDownList ID="DDLState" runat="server" OnSelectedIndexChanged="DDLState_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList>
<asp:DropDownList ID="DDLCity" runat="server" AutoPostBack="true"></asp:DropDownList> 


<div>
    <asp:GridView ID="Grd1" runat="server">
    </asp:GridView>
</div>
</form>

aspx.cs page

   protected void DDLCountry_SelectedIndexChanged(object sender, EventArgs e)
{
    DDLCity.Items.Clear();
    DDLState.Items.Clear();
    if (DDLCountry.SelectedIndex == 1)
    {
        DDLState.Items.Add(new ListItem("select", "0"));
        DDLState.Items.Add(new ListItem("Kerala", "1"));
        DDLState.Items.Add(new ListItem("AP", "2"));
        DDLState.Items.Add(new ListItem("Karnataka", "3"));



    }
    else if (DDLCountry.SelectedIndex == 2)
    {
        DDLState.Items.Add(new ListItem("select", "0"));
        DDLState.Items.Add(new ListItem("Victoria", "1"));
        DDLState.Items.Add(new ListItem("Western Australia", "2"));
        DDLState.Items.Add(new ListItem("New South Wales", "3"));


    }
    else if (DDLCountry.SelectedIndex == 3)
    {
        DDLState.Items.Add(new ListItem("select", "0"));
        DDLState.Items.Add(new ListItem("Balochstan", "1"));
        DDLState.Items.Add(new ListItem("Sindh", "2"));
        DDLState.Items.Add(new ListItem("Punjab", "3"));

    }


}
protected void DDLState_SelectedIndexChanged(object sender, EventArgs e)
{
    DDLCity.Items.Clear();
    if ((DDLCountry.SelectedIndex == 1) && (DDLState.SelectedIndex == 1))
    {
        DDLCity.Items.Add(new ListItem("Calicut", "0"));
        DDLCity.Items.Add(new ListItem("Kochi", "1"));

    }
    else if ((DDLCountry.SelectedIndex == 1) && (DDLState.SelectedIndex == 2))
    {
        DDLCity.Items.Add(new ListItem("Hyderabad", "0"));
        DDLCity.Items.Add(new ListItem("Vijayawada", "1"));
    }
    else if ((DDLCountry.SelectedIndex == 1) && (DDLState.SelectedIndex == 3))
    {
        DDLCity.Items.Add(new ListItem("Bengaluru", "0"));
        DDLCity.Items.Add(new ListItem("Mysore", "1"));
    }
    else if ((DDLCountry.SelectedIndex == 2) && (DDLState.SelectedIndex == 1))
    {
        DDLCity.Items.Add(new ListItem("Melbourne", "0"));
        DDLCity.Items.Add(new ListItem("A", "1"));
    }
    else if ((DDLCountry.SelectedIndex == 2) && (DDLState.SelectedIndex == 2))
    {
        DDLCity.Items.Add(new ListItem("Perth", "0"));
        DDLCity.Items.Add(new ListItem("B", "1"));
    }
    else if ((DDLCountry.SelectedIndex == 2) && (DDLState.SelectedIndex == 3))
    {
        DDLCity.Items.Add(new ListItem("Sydney", "0"));
        DDLCity.Items.Add(new ListItem("C", "1"));
    }
   else if ((DDLCountry.SelectedIndex == 3) && (DDLState.SelectedIndex == 1))
    {
        DDLCity.Items.Add(new ListItem("Lahor", "0"));
        DDLCity.Items.Add(new ListItem("D", "1"));
    }
    else if ((DDLCountry.SelectedIndex == 3) && (DDLState.SelectedIndex == 2))
    {
        DDLCity.Items.Add(new ListItem("Karachi", "0"));
        DDLCity.Items.Add(new ListItem("E", "1"));
    }
    else if ((DDLCountry.SelectedIndex == 3) && (DDLState.SelectedIndex == 3))
    {
        DDLCity.Items.Add(new ListItem("Peshawar", "0"));
        DDLCity.Items.Add(new ListItem("F", "1"));
    }


}

Upvotes: 0

Views: 1101

Answers (2)

zkanoca
zkanoca

Reputation: 9918

I have made a sample for you Maybe it helps:

<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" 
    onselectedindexchanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList>
<asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True" 
    onselectedindexchanged="DropDownList2_SelectedIndexChanged">
</asp:DropDownList>
<asp:DropDownList ID="DropDownList3" runat="server" AutoPostBack="True" 
    onselectedindexchanged="DropDownList3_SelectedIndexChanged">
</asp:DropDownList>
<br />
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>

And the cs code:

public partial class _Default : System.Web.UI.Page
{
    public Random r;
    protected void Page_Load(object sender, EventArgs e)
    {
        r = new Random();
        if (!IsPostBack)
        {
            for (int i = 0; i < 10; i++)
            {
                int n = r.Next(100, 200);
                DropDownList1.Items.Add(new ListItem(n.ToString(), n.ToString()));
            }
        }
    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        r = new Random();
        for (int i = 0; i < 10; i++)
        {
            int n = r.Next(300, 400);
            DropDownList2.Items.Add(new ListItem(n.ToString(), n.ToString()));
        }
    }
    protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
    {
        r = new Random();
        for (int i = 0; i < 10; i++)
        {
            int n = r.Next(500,600);
            DropDownList3.Items.Add(new ListItem(n.ToString(), n.ToString()));
        }
    }
protected void DropDownList3_SelectedIndexChanged(object sender, EventArgs e)
{

        DataTable dt = new DataTable();
        DataRow dr = null;
        dt.Columns.Add(new DataColumn("Column1", typeof(string)));
        dt.Columns.Add(new DataColumn("Column2", typeof(string)));
        dt.Columns.Add(new DataColumn("Column3", typeof(string)));

        dr = dt.NewRow();
        dr["Column1"] = DropDownList1.SelectedItem.Text;
        dr["Column2"] = DropDownList2.SelectedItem.Text;
        dr["Column3"] = DropDownList3.SelectedItem.Text;
        dt.Rows.Add(dr);

        GridView1.DataSource = dt;
        GridView1.DataBind();

    }

}

Upvotes: 0

Hassan
Hassan

Reputation: 1433

protected void DDLCity_SelectedIndexChanged(object sender, EventArgs e)
{
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("Column1", typeof(string)));

dr = dt.NewRow();
dr["Column1"] = DDLState.SelectedItem.Text;
dt.Rows.Add(dr);

dr = dt.NewRow();
dr["Column1"] = DDLCountry.SelectedItem.Text;
dt.Rows.Add(dr);

dr = dt.NewRow();
dr["Column1"] = DDLCity.SelectedItem.Text;
dt.Rows.Add(dr);

dbGridView.DataSource = dt;
dbGridView.DataBind();
}

Upvotes: 1

Related Questions