I have nested repeaters on my aspx page.In the outer repeater I am displaying a list of products and in the inner repeater I am displaying a list of additional options associated with each product.The inner repeater contains a checkbox,textbox,label and other stuff.I would like to find the controls inside the outer repeater when a user selects a checkbox in the inner repeater.In order to handle this I am using the following code.
<asp:Repeater ID="OuterRepeater" runat="server"
onitemdatabound="OuterRepeater_ItemDataBound" >
<ItemTemplate>
<asp:Label ID="CodeLabel" runat="server" Text='<%# Eval("Code") %>'></asp:Label>
<asp:Repeater ID="InnerRepeater" runat="server" OnItemCreated="InnerRepeater_ItemCreated">
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="true"/>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
......
.......
</ItemTemplate>
</asp:Repeater>
......
......
</ItemTemplate>
</asp:Repeater>
protected void InnerRepeater_ItemCreated(object sender, RepeaterItemEventArgs e)
{
RepeaterItem ri = (RepeaterItem)e.Item;
if (ri.ItemType == ListItemType.Item || ri.ItemType == ListItemType.AlternatingItem
)
{
CheckBox cb = ri.FindControl("CheckBox1") as CheckBox;
cb.CheckedChanged += new EventHandler(CheckBox1_CheckedChanged);
}
}
private void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
CheckBox cb = (CheckBox)sender;
if (cb.Checked)
{
//do something
}
else
{
//do something
}
}
But the checkedChanged event of the checkbox is not firing for some reason.Also I am not sure how to access the textbox of the outer repeater in the checked changed event of the innter repeater checkbox control.
Could someone please help me with this?
Thanks
It does not fire the CheckedChanged event, since you have declared the event handler as private, You have to make it Protected or Public
Protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
You can access the Textbox control like..
private void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
CheckBox checkBox = (CheckBox)sender;
Textbox textbox1 = (TextBox)checkBox.Parent.FindControl("TextBox1");
String textboxText = textbox1.Text;
}
It doesn't look like you defined an event handler in your markup.
<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="true" OnCheckedChanged="CheckBox1_CheckedChanged" />
Muhammad Akhtar's answer helped me a lot today!
I just needed to set a specific ID to my dynamic generated checkboxes inside my reapeater to recover the origin of the event, and do the rest of the processing, and it worked perfectly.
chkAtivo.ID = DataBinder.Eval(e.Item.DataItem, "id").ToString();
Reovered just as the sample.
Cant vote up yet, but thank you.
Related
How do you achive something like below in asp.net?
<asp:Label runat="server" Text="The '<%# CustomValue %>' you assigned."/>
This usually depends on where your Label resides. If it is a stond alone control, not nested inside a repeater, you just set your code in code behind:
Label1.Text = $"The {CustomValue} you assigned.";
If the label is nested inside an ItemTemplate in some sort of Repeater control, you can strongly type it to an objects property:
<asp:Repeater runat="server" ID="MyRepeater" ItemType="WebFormsSandbox.Person">
<ItemTemplate>
<li>
<%#: Item.FirstName %> <%#: Item.LastName %>
</li>
</ItemTemplate>
</asp:Repeater>
and the corresponding code behind:
protected void Page_Load(object sender, EventArgs e)
{
MyRepeater.DataSource = Persons();
MyRepeater.DataBind();
}
IEnumerable<Person> Persons()
{
for (int i = 0; i < 10; i++)
{
yield return new Person { Id= i, FirstName = $"Foo{i}", LastName = $"Bar{i}" };
}
}
This would create a list of links, where you then could do anything with it. Whether this would pop up a custom window or does a postback .. up to you.
If you really want to do it that way, write the string inside the server tags.
<asp:Label runat="server" Text='<%# "The " + CustomValue + " you assigned." %>'/>
However if the Label is not inside a GridView, Repeater etc you have to call DataBind manually.
protected void Page_Load(object sender, EventArgs e)
{
DataBind();
}
You would typically do this in the code behind on page load, unless you were using a datagrid or repeater control. Assign an ID to your control and reference it like so.
<asp:Label runat="server" ID="Label1" />
protected void Page_Load(object sender,EventArgs e)
{
Label1.Text = "Your Value";
}
I have a nested repeater and need to findout the ItemIndex of the outer repeater when user click the radio button in the inner repeater.
I tried using rb.parent.parent and also rb.NamingContainer.NamingContainer but I got casting error.
I also searched different sites regarding similar problems but they were not a solution for mine.
Any comment is highly appreciated.
protected void rptrSubscriptionGroups_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
Repeater rptrSubscriptions = (Repeater)e.Item.FindControl("rptrSubscriptions");
if (rptrSubscriptions != null)
{
RepeaterItem item = e.Item;
if (e.Item.ItemType == (ListItemType.Item) || e.Item.ItemType == (ListItemType.AlternatingItem))
{
DataTable SubscriptionTbl = SubscriptionsBind(SelectedLanguageID, SelectedPlatformID, SelectedCurrencyID, SelectedGroupID, 1);
rptrSubscriptions.DataSource = SubscriptionTbl;
rptrSubscriptions.DataBind();
}
}
}
protected void HighlightSubscription(object source, EventArgs e)
{
RadioButton rb = source as RadioButton;
int CurrentrepeaterItemIndex = ((RepeaterItem)rb.NamingContainer).ItemIndex;
// save current row index in a hiddden field
hiddenSelectedSubscriptionRowIndex.Value = CurrentrepeaterItemIndex.ToString();
int ParentRepeaterItemIndex = ((RepeaterItem)rb.NamingContainer.NamingContainer).ItemIndex;
hiddenSelectedSubscriptionGroupRowIndex.Value = ParentRepeaterItemIndex.ToString();
}
<asp:Repeater ID="rptrSubscriptionGroups" runat="server" OnItemDataBound="rptrSubscriptionGroups_ItemDataBound" OnItemCommand="rptrSubscriptionGroups_ItemCommand">
<ItemTemplate>
<asp:Repeater ID="rptrSubscriptions" runat="server" OnItemDataBound="rptrSubscriptions_ItemDataBound" OnItemCommand="rptrSubscriptions_ItemCommand">
<ItemTemplate>
<asp:RadioButton ID="rbSubscription" runat="server" OnCheckedChanged="HighlightSubscription" AutoPostBack="true"/>
</ItemTemplate>
</asp:Repeater>
</ItemTemplate>
</asp:Repeater>
You said that you have tried with Parent.Parent but I think that you can do it with it :
int CurrentrepeaterItemIndex = ((RepeaterItem)rb.Parent.Parent.Parent).ItemIndex;
The First Parent is going one level up to the ItemTemplate :
<ItemTemplate>
<asp:RadioButton ID="rbSubscription" runat="server" OnCheckedChanged="HighlightSubscription" AutoPostBack="true"/>
The Second Parent is going again one level up to the inner Repeater :
<asp:Repeater ID="rptrSubscriptions" runat="server" OnItemDataBound="rptrSubscriptions_ItemDataBound" OnItemCommand="rptrSubscriptions_ItemCommand">
The Third Parent is going to the outer Repeater item and you can get the item index.
<asp:Repeater ID="rptrSubscriptionGroups" runat="server" OnItemDataBound="rptrSubscriptionGroups_ItemDataBound" OnItemCommand="rptrSubscriptionGroups_ItemCommand">
<ItemTemplate>
I have a CheckBox inside a Repeater. Like this:
<asp:Repeater ID="rptEvaluationInfo" runat="server">
<ItemTemplate>
<asp:Label runat="server" Id="lblCampCode" Text="<%#Eval("CampCode") %>"></asp:Label>
<asp:CheckBox runat="server" ID="cbCoaching" value="coaching-required" ClientIDMode="AutoID" AutoPostBack="True" OnCheckedChanged="cbCoaching_OnCheckedChanged" />
</ItemTemplate>
</asp:Repeater>
When some one clicks on the checkbox I want to get that entire row in my code behind. So if a CheckedChanged happens I want to get the Text of the Label lblCampCode in code behind.
Is it possible?
I have managed to write this much code.
protected void cbCoaching_OnCheckedChanged(object sender, EventArgs e)
{
CheckBox chk = (CheckBox)sender;
Repeater rpt = (Repeater)chk.Parent.Parent;
string CampCode = "";// here i want to get the value of CampCode in that row
}
So you want to get the RepeaterItem? You do that by casting the NamingContainer of the CheckBox(the sender argument). Then you're almost there, you need FindControl for the label:
protected void cbCoaching_OnCheckedChanged(object sender, EventArgs e)
{
CheckBox chk = (CheckBox)sender;
RepeaterItem item = (RepeaterItem) chk.NamingContainer;
Label lblCampCode = (Label) item.FindControl("lblCampCode");
string CampCode = lblCampCode.Text;// here i want to get the value of CampCode in that row
}
This has the big advantage over Parent.Parent-approaches that it works even if you add other container controls like Panel or Table.
By the way, this works the similar way for any databound web-control in ASP.NET (like GridView etc).
My Scenario,
When i select the option in list i need to perform some action like Textbox should be disabled. But i don find my breakpoint pointing to that action to be performed.Pls help
I guess you mean the SelectedIndexChanged event does not fire that is so because you'vent set the AutoPostBack to true.
<asp:RadioButtonList ID="RadioButtonList1" runat="server" AutoPostBack="True"
onselectedindexchanged="RadioButtonList1_SelectedIndexChanged">
</asp:RadioButtonList>
Code
protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
TextBox4.Enabled = false;
}
I think this is a "doh" moment caused by me not having dome WebForms dev for a few years..
I have a repeater which which contains a bunch of checkboxes:
<asp:Repeater EnableViewState="true" ID="IDTypesRepeater" runat="server" OnItemDataBound="IdTypesRepeaterItemDataBound">
<HeaderTemplate/>
<ItemTemplate>
<asp:CheckBox EnableViewState="true" ID="chkIdType" Text="<%# ((KeyValuePair<string,int>)Container.DataItem).Key %>" runat="server" />
<asp:HiddenField ID="idType" Value="<%# ((KeyValuePair<string,int>)Container.DataItem).Value %>" runat="server"/>
<br />
</ItemTemplate>
</asp:Repeater>
I need to get the checkboxes that are selected in the code behind:
foreach (RepeaterItem repeaterItem in IDTypesRepeater.Items)
{
if ( ((CheckBox)repeaterItem.FindControl("chkIdType")).Checked )
{
// Do something
}
}
But on postback, this code isn't working! I know about always databinding a repeater, so I've done this:
protected void Page_Load(object sender, EventArgs e)
{
IDTypesRepeater.DataSource = DocTemplateHelper.GetApplicableIDTypes().Where(type => type.Value != 0);
IDTypesRepeater.DataBind();
}
So this repopulates the repeater, but the Update code never finds any checked checkboxes.. Any ideas?
Bind in the Page_Init event
protected void Page_Init(object sender, EventArgs e)
{
IDTypesRepeater.DataSource = DocTemplateHelper.GetApplicableIDTypes().Where(type => type.Value != 0);
IDTypesRepeater.DataBind();
}
Be sure to use the !Page.IsPostBack method in your pageload.
Otherwise, the Repeater will keep getting reset, and all your checkboxes
will be in there default value (unchecked)
This should fix it. You are binding the control on postback hence losing the values. You can bind it after handling any event to show the updated record.
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
IDTypesRepeater.DataSource = DocTemplateHelper.GetApplicableIDTypes().Where(type => type.Value != 0);
IDTypesRepeater.DataBind();
}
}