selected value in dropdownlist and then show velue in another dropdownlist in asp.net

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1.00/5 (1 vote)

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C#

ASP.NET

selected value in dropdownlist and then show velue in another dropdownlist in asp.net

Posted 21-Aug-12 22:03pm

M@anish

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I.explore.code 22-Aug-12 4:04am

your question is not clear, please elaborate. Be specific and put some code up.

Anuja Pawar Indore 22-Aug-12 9:14am

why repost?

5 solutions

Solution 2

This should give you some information you need
cascading dropdownlist [^]

Posted 21-Aug-12 22:13pm

__TR__

Solution 1

Make the dropdownlist Autopostback property to True.
Then inside Dropdownlist SelectedIndexChanged event, bind the value to another dropdownlist.

Posted 21-Aug-12 22:07pm

Sunil Kumar Pandab

Solution 4

Try out the following code.

C#

string strSql="select [id],[name] from [tablename1]";
//write code here for fetching data
dropdownlist1.datasource=ds;
dropdownlist1.DataTextField="name";
dropdownlist1.DataValueField="id";
dropdownlist1.databind();
ds.Clear();


protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
  string strSql1="select [id],[name] from [tablename2] where id='"+ dropdownlist1.SelectedValue +"'";
//write code here for fetching data
dropdownlist2.datasource=ds1;
dropdownlist2.DataTextField="name";
dropdownlist2.DataValueField="id";
dropdownlist2.databind();
ds1.Clear();
}

Thanks
Ashish

Posted 21-Aug-12 22:43pm

AshishChaudha

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Sandip.Nascar · Accepted Answer · 2012-08-21T22:16:00

Here is the code for you.
To fill up the database, call the database to populate dropdown.

code behind

protected void Page_Load(object sender, EventArgs e)
{
    DropDownList1.Items.Add(new ListItem("Sandip", "1"));
    DropDownList1.Items.Add(new ListItem("Jon", "2"));
    DropDownList1.Items.Add(new ListItem("Michael", "3"));
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
    DropDownList2.Items.Clear();
    if (DropDownList1.SelectedIndex == 0)
    {
        DropDownList2.Items.Add(new ListItem("DOT.NET", "1"));
        DropDownList2.Items.Add(new ListItem("C#", "2"));
        DropDownList2.Items.Add(new ListItem("ASP.NET", "3"));
        DropDownList2.Items.Add(new ListItem("LINQ", "4"));
    }
    else if (DropDownList1.SelectedIndex == 1)
    {
        DropDownList2.Items.Add(new ListItem("DOT.NET", "1"));
        DropDownList2.Items.Add(new ListItem("VB.NET", "2"));
        DropDownList2.Items.Add(new ListItem("ASP.NET", "3"));
    }
    else if (DropDownList1.SelectedIndex == 2)
    {
        DropDownList2.Items.Add(new ListItem("PHP", "1"));
        DropDownList2.Items.Add(new ListItem("MYSQL", "2"));
    }

}

aspx code

<asp:dropdownlist id="DropDownList1" runat="server" autopostback="True" xmlns:asp="#unknown">
    onselectedindexchanged="DropDownList1_SelectedIndexChanged">
</asp:dropdownlist>
<br />
<br />
<asp:dropdownlist id="DropDownList2" runat="server" xmlns:asp="#unknown">
</asp:dropdownlist>

cheers

Rahul Rajat Singh · Accepted Answer · 2012-08-21T23:08:00

Solution 5

This is called cascading dropdownlist. here is an article that presents 2 approaches to do the same. contains sample projects too. refer it and see if it could be helpful

AJAX for beginners (Part 2) - Using XMLHttpRequest and jQuery AJAX to implement a cascading dropdown[^]

Posted 21-Aug-12 23:08pm

Rahul Rajat Singh

Comments

AshishChaudha 22-Aug-12 5:17am

my +5

selected value in dropdownlist and then show velue in another dropdownlist in asp.net

5 solutions

Solution 3

Solution 5

Solution 2

Solution 1

Solution 4

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