I have a Radiobuttonlist and I want after the Item with value 1 is selected to do something. When I used RadioButtonListType.SelectedValue is returning "" and when I use RadioButtonListType.SelectedIndex is returning -1.
Where I am doing wrong ?
this is my code
aspx
<asp:RadioButtonList ID="RadioButtonListType" runat="server" OnSelectedIndexChanged="RadioButtonListType_SelectedIndexChanged" ValidationGroup="emergency" AutoPostBack="True">
<asp:ListItem Value="0">Normal</asp:ListItem>
<asp:ListItem Value="1">Emergency</asp:ListItem>
</asp:RadioButtonList>
.cs
protected void RadioButtonListType_SelectedIndexChanged(object sender, EventArgs e)
{
if (RadioButtonListSF.SelectedIndex == 1)
{
MPEEmergency.Show();
}
}
Related
In my aspx file, I have a drop down list
<asp:DropDownList runat="server" ID="Dlist" CssClass="dropdown" AutoPostBack="true" SelectedIndexChanged="CtrlChanged">
<asp:ListItem Text="Select item" Value="1"></asp:ListItem>
</asp:DropDownList>
I have a radio button list
<asp:RadioButtonList ID="RadioButtonList1" RepeatColumns="1"
RepeatDirection="Vertical" RepeatLayout="Table" runat="server" AutoPostBack="true">
<asp:ListItem>Option 1</asp:ListItem>
<asp:ListItem>Option 2</asp:ListItem>
</asp:RadioButtonList>
Now I want to change the name of one or both of the radio buttons in the radio button list after something has been selected from the dropdown list using C#. Below is my attempt but not working.
protected void CtrlChanged(Object sender, EventArgs e) {
//attempting to change text of first radio button when item has been selected from dropdownlist
RadioButtonList1.SelectedIndex = 0;
RadioButtonList1.SelectedItem.Text = "Text changed!";
}
First, it is OnSelectedIndexChanged, not SelectedIndexChanged. And the ListItems of a RadioButtonList are index based, so you need to access them like this:
protected void CtrlChanged(object sender, EventArgs e)
{
RadioButtonList1.Items[0].Text = "NewValue 1";
RadioButtonList1.Items[1].Text = "NewValue 2";
}
Your way does change the text, but only for the item you set the SelectedIndex of. And it will change the selected radiobutton to the first one, should one already have been selected.
I have a problem, when I try to get selectedindex from asp:listbox in codebehind, it always stays -1, even thought on the page it is selected. I am fully updating this list every minute. For loading listItems, the entire list gets erased and written back again.
Code samples:
<asp:ListBox ID="ListBox1" runat="server"
OnSelectedIndexChanged="ListBox1_SelectedIndexChanged"
AutoPostBack="false">
</asp:ListBox>
In codebehind:
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
itemsIndex = ListBox1.SelectedIndex.ToString(); //It is always -1
itemToBeRescheduled = ListBox1.SelectedItem.Value;
}
Tried using if(!isPostBack).. but the index stayed -1 and it only erased my items from the list.
Thanks in advance!
In my experience, it happens when you rebind ListView on postback again. In order to prevent it, we normally place binding inside !IsPostback.
For example,
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ListBox1.DataSource = new List<ListItem>()
{
new ListItem("One", "1"),
new ListItem("Two", "2"),
new ListItem("Three", "3")
};
ListBox1.DataBind();
}
}
When I have:
<asp:ListBox ID="ListBox1" runat="server" Height="140px" Width="290px" Font-Size="22px" autopostback="true" OnSelectedIndexChanged="ListBox1_SelectedIndexChanged">
<asp:ListItem>Item 1</asp:ListItem>
<asp:ListItem>Item 2</asp:ListItem>
<asp:ListItem>Item 3</asp:ListItem>
<asp:ListItem>Item 4</asp:ListItem>
<asp:ListItem>Item 5</asp:ListItem>
<asp:ListItem>Item 6</asp:ListItem>
</asp:ListBox>
<br />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
And:
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
if (ListBox1.SelectedIndex == -1)
TextBox1.Text = "-1";
else
TextBox1.Text = ListBox1.SelectedItem.Text;
}
I don't get ListBox1.SelectedIndex = -1.
I have four dropdownlistbox in my form, i want to load items into three dropdownlists according to the selection of items from the first drop down list , my first dropdown list has folloding items
Amount ,
PAC ,
Base UOM
Whatever i am selecting from first drop down list , i want to load the same selected item into remaining three dropdownlist
I have tried the following code but it is not working as expected
protected void ddl_UOM_SelectedIndexChanged(object sender, EventArgs e)
{
string uom_Name = ddl_UOM.SelectedItem.Value;
ddl_UOM2.Items.Add(uom_Name);
ddl_UOM3.Items.Add(uom_Name);
ddl_UOM4.Items.Add(uom_Name);
}
pls help.
You need to use Ajax Control Tool kit's Cascaded Drop-down
Here is the like for it:
http://www.asp.net/AjaxLibrary/AjaxControlToolkitSampleSite/Walkthrough/CCDWithDB.aspx
and here is the demo:
http://www.asp.net/AjaxLibrary/AjaxControlToolkitSampleSite/CascadingDropDown/CascadingDropDown.aspx
here is a tutorial link:
http://www.dotnetfox.com/articles/ajax-cascading-dropdown-example-with-database-in-Asp-Net-1078.aspx
Hope this material helps.
May be you don't have set AutoPostBack property to true. Try below code sample :
ASPX:
<asp:DropDownList runat="server" ID="parentDropDown" OnSelectedIndexChanged="parentDropDown_SelectedIndexChanged" AutoPostBack="true">
<asp:ListItem Text="1" Value="1"></asp:ListItem>
<asp:ListItem Text="2" Value="2"></asp:ListItem>
<asp:ListItem Text="3" Value="3"></asp:ListItem>
</asp:DropDownList>
<asp:DropDownList runat="server" ID="child1">
</asp:DropDownList>
<asp:DropDownList runat="server" ID="child2">
</asp:DropDownList>
Code Behind:
protected void parentDropDown_SelectedIndexChanged(object sender, EventArgs e)
{
string uom_Name = parentDropDown.SelectedValue;
child1.Items.Add(uom_Name);
child2.Items.Add(uom_Name);
}
If you want to remove existing item from child before you add then:
protected void parentDropDown_SelectedIndexChanged(object sender, EventArgs e)
{
string uom_Name = parentDropDown.SelectedValue;
child1.Items.Clear();
child2.Items.Clear();
child1.Items.Add(uom_Name);
child2.Items.Add(uom_Name);
}
You have to set AutoPostBack="true" to the first drop down list and clear other drop downs items before adding new item.
ASPX:
<asp:DropDownList ID="ddl_UOM" runat="server" OnSelectedIndexChanged="ddl_UOM_SelectedIndexChanged" AutoPostBack="true">
<asp:ListItem Text="Amount" Value="Amount"></asp:ListItem>
<asp:ListItem Text="PAC" Value="PAC"></asp:ListItem>
<asp:ListItem Text="Base" Value="Base"></asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="ddl_UOM2" runat="server"></asp:DropDownList>
<asp:DropDownList ID="ddl_UOM3" runat="server"></asp:DropDownList>
<asp:DropDownList ID="ddl_UOM4" runat="server"></asp:DropDownList>
ASPX.CS
protected void ddl_UOM_SelectedIndexChanged(object sender, EventArgs e)
{
string uom_Name = ddl_UOM.SelectedItem.Value;
ddl_UOM2.Items.Clear();
ddl_UOM2.Items.Add(new ListItem(uom_Name, uom_Name));
ddl_UOM3.Items.Clear();
ddl_UOM3.Items.Add(new ListItem(uom_Name, uom_Name));
ddl_UOM4.Items.Clear();
ddl_UOM4.Items.Add(new ListItem(uom_Name, uom_Name));
}
protected void ddl_UOM_SelectedIndexChanged(object sender, EventArgs e)
{
string uom_Name = ddl_UOM.SelectedItem.Value;
ddl_UOM2.Items.Clear();
ddl_UOM3.Items.Clear();
ddl_UOM4.Items.Clear();
ddl_UOM2.Items.Add(uom_Name);
ddl_UOM3.Items.Add(uom_Name);
ddl_UOM4.Items.Add(uom_Name);
}
After writing code in ddl_UOM_SelectedIndexChanged() , call ddl_UOM_SelectedIndexChanged() method from Page_Load()
protected void Page_Load(object sender, EventArgs e)
{
try
{
if (!IsPostBack)
{
ddl_UOM_SelectedIndexChanged(sender, e );
}
}
catch (Exception)
{
throw;
}
}
You should try to use PageMethods in JS to load the dropdowns any way you like any time you like.
I have created event for select index changed for dropdownlist like below but the event is not firing.I dont know what is going wrong?
<asp:DropDownList ID="ddlcurrency" runat="server" OnSelectedIndexChanged="ddlcurrency_SelectedIndexChanged1" >
<asp:ListItem Value="Nrs" >Nrs</asp:ListItem>
<asp:ListItem Value="$" >$</asp:ListItem>
</asp:DropDownList>
protected void ddlcurrency_SelectedIndexChanged1(object sender, EventArgs e)
{
if (!IsPostBack)
{
if (ddlcurrency.Items.FindByText("$").Selected == true) //keeping the currency value in session
{
Session["Curr"] = "Dol";
}
else
{
Session["Curr"] = "Nrs";
}
}
}
try this:
<asp:DropDownList ID="ddlcurrency" runat="server" AutoPostBack="true" OnSelectedIndexChanged="ddlcurrency_SelectedIndexChanged1" >
<asp:ListItem Value="Nrs" >Nrs</asp:ListItem>
<asp:ListItem Value="$" >$</asp:ListItem>
</asp:DropDownList>
Have you tried setting a break point at the SelectedIndexChaged event of the DDL to check if HITS there?
<asp:DropDownList ID="ddlcurrency" runat="server" AutoPostback="true" OnSelectedIndexChanged="ddlcurrency_SelectedIndexChanged1" >
<asp:ListItem Value="Nrs" >Nrs</asp:ListItem>
<asp:ListItem Value="$" >$</asp:ListItem>
</asp:DropDownList>
protected void ddlcurrency_SelectedIndexChanged1(object sender, EventArgs e)
{
if (ddlcurrency.Items.FindByText("$").Selected == true) //keeping the currency value in session
{
Session["Curr"] = "Dol";
}
else
{
Session["Curr"] = "Nrs";
}
}
Set autopost back property of dropdown control to true
<asp:DropDownList ID="ddlcurrency" runat="server"
OnSelectedIndexChanged="ddlcurrency_SelectedIndexChanged1" AutoPostBack="true" >
I have an aspx site with a DropDownList in it. I want to be able to choose between 3 variables there and then keep the chosen value for the postback. The page is made so that it loads 10 entries from the database and with this DropDownList I want to be able to choose between 10, 20, 30 entries.
DropDownList
<asp:DropDownList ID="dd1" runat="server" AutoPostBack="True" EnableViewState="True">
<asp:ListItem Value="10">10</asp:ListItem>
<asp:ListItem Value="20">20</asp:ListItem>
<asp:ListItem Value="30">30</asp:ListItem>
</asp:DropDownList>
Here I am trying to set the value that is being sent to the database for the query that brings out the 10, 20 or 30 first entries.
public IEnumerable<XX> repOrder_GetData([ViewState]DateTime? UpdatedRows)
{
var ordrar = _facade.OrderGetForAttest(1, Convert.ToInt32(dd1.SelectedValue));
return ordrar;
}
How do I retain this value during a postback because the page will reload every time you choose something in the DropDownList resulting in only the first value ever being chosen.
protected void Page_Init(object sender, EventArgs e)
{
try
{
_masterpage = this.Master as XX.resource.masterpage.Site;
}
catch (Exception)
{
throw;
}
}
protected void Page_Load(object sender, EventArgs e)
{
// Kolla behörighet första gången.
KollaBehorighet();
_masterpage.ClearMessage();
if (Page.IsPostBack)
{
}
else
{
Page.DataBind();
// Första gången..
PageInit();
FillPage(null);
//FIXME: xxx.Focus();
}
}
You should set the 'OnSelectedIndexChanged' event.
<asp:DropDownList ID="dd1" runat="server" AutoPostBack="True" onselectedindexchanged="ddlItemSelected" EnableViewState="True">
<asp:ListItem Value="10">10</asp:ListItem>
<asp:ListItem Value="20">20</asp:ListItem>
<asp:ListItem Value="30">30</asp:ListItem>
</asp:DropDownList>
protected void ddlItemSelected(object sender, EventArgs e)
{
//Add your selected value to viewstate or session or whatever. Then check this value when binding on postback.
Viewstate["myValue"] = dd1.SelectedValue;
}
You can try to store it in Session state and then load it from session
Some like this:
Session["Selected"] = dd1.SelectedIndex;
And in Load Event you can use:
dd1.SelectedIndex = Convert.ToInt32(Session["Selected"]);