I have a project that using dropdownlist for choices.When check checkbox1 dropdown automatically bind data from database using table1 and when I check checkbox2 dropdown automatically binding data from database using table2.I do not want to use get data by using any button .How can I do that .Please help me.
here is code by using button:
public void LokasyonDoldur()
{
birimBUS = new BirimBUSV1();
List<BirimVO> birimVO = new List<BirimVO>();
DrpChcs.Items.Clear();
List<ListItem> items = new List<ListItem>();
birimVO = birimBUS.LokasyonlariGetir();
foreach (var item in birimVO)
{
items.Add(new ListItem(item.BirimAdi, item.ID.ToString()));
}
DrpChcs.Items.AddRange(items.ToArray());
}
public void BirimleriDoldur()
{
PoliklinikBUS poliklinikBUS = new PoliklinikBUS();
List<PoliklinikVO> poliklinikVO = new List<PoliklinikVO>();
DrpChcs.Items.Clear();
List<ListItem> items = new List<ListItem>();
poliklinikVO = poliklinikBUS.Poliklinikler();
foreach (var item in poliklinikVO)
{
items.Add(new ListItem(item.PoliklinikAdi, item.ID.ToString()));
}
DrpChcs.Items.AddRange(items.ToArray());
}
protected void BtnLokasyon_Click(object sender, EventArgs e)
{
if (ChckLctn.Checked == true && ChckBrm.Checked==false)
{
LokasyonDoldur();
}
else if (ChckLctn.Checked == false && ChckBrm.Checked == true)
{
BirimleriDoldur();
}
else
{
}
Button1.Visible = true;
BtnLokasyon.Visible = false;
}
protected void DrpChcs_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
KirilimId = Int32.Parse(DrpChcs.SelectedValue);
BPolikilinikID= KirilimId;
}
but I do not want to use this one.
ohh its another language. its hard to read. but what you basicly have to do is check which checkbox is checked in the page load and then load the dropdown based on what is loaded.
something like this. (I have typed it from my head so its not like copy-paste but you get the idea)
page_load
{
if(checkbox1.checked)
{
dropdown.dataitems = items1;
dropdown.databind();
return;
}
if(checkbox2.checked)
{
dropdown.dataitems = items2;
dropdown.databind();
return;
}
}
YOu can call the Button1_click event from the Dropdown list selected index changed event like this
Button1_Click(Button1,new EventArgs());
and in this you can hide that button from the page and in code behind you are calling the same function
OR
You can refactor the code in a seperate function from the button click event and call that function in the selected index changed event.
Please let me knwo if I misunderstood your question
Thanks
Related
I am creating a tree programmatically inside a row in a table.
Works fine, but can not get the assigned event is called:
TreeView arbolCapas = new TreeView();
arbolCapas.ID = "capas";
foreach (String capa in servicio.Capas)
{
TreeNode childNodes = new TreeNode();
childNodes.Text = capa;
childNodes.ShowCheckBox = true;
childNodes.SelectAction = TreeNodeSelectAction.None;
arbolCapas.Nodes.Add(childNodes);
}
arbolCapas.SelectedNodeChanged +=new EventHandler(arbolCapas_TreeNodeCheckChanged);
tbC.Controls.Add(arbolCapas);
tbR.Cells.Add(tbC);
protected void arbolCapas_TreeNodeCheckChanged(Object sender, EventArgs e)
{
TreeView elemento = (TreeView)(((CheckBox)sender).Parent);
foreach (TreeNode node in elemento.CheckedNodes)
{ //if (node.Checked)
}
}
How I can call an event when the checkbox of a child node is checked?
Thanks a lot.
Kindly change
childNodes.SelectAction = TreeNodeSelectAction.None
to
childNodes.SelectAction = TreeNodeSelectAction.Select;
I found the solution by adding the event as follows:
arbolCapas.Attributes.Add("onclick", "OnCheckBoxCheckChanged(event)");
And then, in javascript:
function OnCheckBoxCheckChanged(evt) {
alert("check change");
}
Here the solution:
http://geekswithblogs.net/ranganh/archive/2009/01/21/updated-asp.net-treeview-checkboxes-ndash-check-all-ndash-javascript.aspx
I'm having a strange problem, I've made a Select all checkbox, that mark as selected a lot of checkboxes.
This is the CheckedChanged event
protected void chkSelecionaTodasOcorrencias_CheckedChanged(object sender, EventArgs e)
{
if (chk_selecionaTodasOcorrencias.Checked)
{
foreach (ListItem c in chkBox_TiposOcorrencia.Items)
{
c.Selected = true;
}
}
else
{
foreach (ListItem c in chkBox_TiposOcorrencia.Items)
{
c.Selected = false;
}
}
chkBox_TiposOcorrencia.DataBind();
}
It checks all checkboxes, or uncheck all.
Then I Have another method that insert all checkedboxes in a list.
private List<int> insertItensInListIntegers(ListItemCollection itens)
{
int value = 0;
List<int> queryItens = new List<int>();
foreach (ListItem c in itens)
{
if (c.Selected) //<-- Here i'm getting false
{
tiposOcorrencias.TryGetValue(c.Text, out value);
queryItens.Add(value);
}
}
return queryItens;
}
The value informed in parameter is: chkBox_TiposOcorrencia.Items
At screen all checkboxes are cheched, but when I try debug, the c.Selected value is false.
Thanks in advance.
Like Freak_Droid was describing in his comment, if you are loading your checkboxes on pageload, simply put your code that loads your checkboxes inside an if statement checking for !ispostback. For example--
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//here is where you would put any of your code for databinding your checkboxes
}
}
I have a ListView in an ASP.NET web application. When a user clicks the edit button, I want textfields to pop up that are dependent on certain values of the item. However, I can't seem to find any controls inside of my ListView1_ItemEditing() function.
I have read the Microsoft documentation and various help threads on the internet, but their suggestions do not appear to work for me. This is generally what I see:
ListViewItem item = ProductsListView.Items[e.NewEditIndex];
Label dateLabel = (Label)item.FindControl("DiscontinuedDateLabel");
For the sake of simplicity I just want to be able to select a label in ListView1_ItemEditing(). This is the code in ListView1_ItemEditing():
protected void ListView1_ItemEditing(Object sender, ListViewEditEventArgs e)
{
DataBind(); //not sure if this does anything
ListViewItem item = ListView1.Items[e.NewEditIndex];
Label debugLabel = (Label)item.FindControl("label_editing");
debugLabel.Text = "Works";
}
Here is the ASP
<EditItemTemplate>
<asp:Label ID="label_editing" runat="server" Text="hello world"></asp:Label>
</EditItemTemplate>
When debugging, item and debugLabel are both NULL.
UPDATE: I resolved this issue by moving my logic to ItemDataBound and then checking if my tr (containing textboxes) was in that particular data item. Code below:
protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
Control tr_verizon = e.Item.FindControl("tr_verizonEdit");
Control tr_att = e.Item.FindControl("tr_attEdit");
if (tr_verizon != null)
{
//Control tb_meid = e.Item.FindControl("TextBox_Meid");
Label lbl_carrierId = (Label)e.Item.FindControl("lbl_carrierId");
if (lbl_carrierId == null)
{
Message.Text = "lbl_carrierId is null!";
}
else if (lbl_carrierId.Text.Equals(""))
{
Message.Text = "lbl_carrierId is empty!";
}
else
{
string recordId = lbl_carrierId.Text;
if (tr_verizon != null && tr_att != null)
{
if (lbl_carrierId.Text.Equals("1"))
{
tr_verizon.Visible = false;
tr_att.Visible = true;
}
else
{
tr_verizon.Visible = true;
tr_att.Visible = false;
}
}
}
}
}
}
The ItemEditing event is raised when an item's Edit button is clicked, but before the ListView item is put in edit mode. Therefore controls in EditItemTemplate are not available at this time.
More Info and example
You should do the DataBind() first, like this:
ListView1.EditIndex = e.NewEditIndex;
ListView1_BindData(); // a function that get the DataSource and then ListView1.DataBind()
// Now find the control as you did before
Have you tried casting the sender object instead of trying to access your ListViewItem by index?
protected void ListView1_ItemEditing(Object sender, ListViewEditEventArgs e)
{
var item = sender as ListViewItem;
var debugLabel = item.FindControl("label_editing") as Label;
debugLabel.Text = "Works";
}
So I have a listbox on my page and some textfields. Through the textfields I can add an item to my listbox (click the button, it adds it to a private List<string> which is then set as a ViewState and the list is databound again).
My listbox is also in an updatepanel which gets triggered on the button's Click event.
Problem: My Viewstate remains null on a postback so it gets reset each time.
Some code:
private List<IngredientData> _ingredientsList;
protected void Page_Load(object sender, EventArgs e)
{
// prepare ingredient lists
_ingredientsList = new List<IngredientData>();
if (Page.IsPostBack)
{
if (ViewState["IngredientsList"] != null)
{
_ingredientsList = (List<IngredientData>) ViewState["IngredientsList"];
}
}
lstIngredients.DataSource = _ingredientsList;
lstIngredients.DataTextField = "Text";
lstIngredients.DataValueField = "Name";
lstIngredients.DataBind();
}
protected void btnAddIngredient_Click(object sender, EventArgs e)
{
_ingredientsList.Add(new IngredientData { Name = txtIngredientName.Text, Quantity = txtUnitQuantity.Text, Unit = lstUnits.SelectedValue });
ViewState["IngredienstList"] = _ingredientsList;
lstIngredients.DataSource = _ingredientsList;
lstIngredients.DataBind();
}
Any idea how I can fix this? Am I doing something wrong?
btnAddIngredient_Click is adding to "IngredienstList" not "IngredientsList" (note the spelling).
You can avoid this kind of typo by using a constant:
private const string IngredientsListViewStateKey = "IngredientsList";
then referring to it like this:
ViewState[IngredientsListViewStateKey] = _ingredientsList;
namespace Dynamic_Controls.Dropdowndynamic
{
public partial class DropdowndynamicUserControl : UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
if (ControlCount != 0)
{
Recreatecontrols();
}
}
private void Recreatecontrols()
{
// createtextboxes(ControlCount);
createtextboxes(2);
}
protected void createtextboxes(int ControlCount)
{
DynPanel.Visible = true;
for (int i = 0; i <= ControlCount; i++)
{
TextBox tb = new TextBox();
tb.Width = 150;
tb.Height = 18;
tb.TextMode = TextBoxMode.SingleLine;
tb.ID = "TextBoxID" + this.DynPanel.Controls.Count;
tb.Text = "EnterTitle" + this.DynPanel.Controls.Count;
tb.Load+=new EventHandler(tb_Load);
tb.Visible = true;
tb.EnableViewState = true;
DynPanel.Controls.Add(tb);
DynPanel.Controls.Add(new LiteralControl("<br/>"));
}
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
Int32 newControlCount = Int32.Parse(DropDownList1.SelectedValue);
//createtextboxes(newControlCount);
//ControlCount+=newControlCount;
createtextboxes(2);
}
protected void Button1_Click(object sender, EventArgs e)
{
readtextboxes();
}
public void readtextboxes()
{
string x = string.Empty;
for (int a = 0; a < DynPanel.Controls.Count; a++)
{
foreach (Control ctrl in DynPanel.Controls)
{
if (ctrl is TextBox)
{
x = ((TextBox)ctrl).Text;
}
x+=x+("\n");
}
Result.Text = x;
}
}
private Int32 ControlCount
{
get
{
if (ViewState["ControlCount"] == null)
{
ViewState["ControlCount"] = 0;
}
return (Int32)ViewState["ControlCount"];
}
set
{
// ViewState["ControlCount"] = value;
ViewState["ControlCount"] = 2;
}
}
private void tb_Load(object sender, EventArgs e)
{
LblInfo.Text = ((TextBox)sender).ID + "entered";
}
}
}
Are you adding these controls dynamically in Page_Load (by, I'm assuming, calling your AddRequiredControl() method)? If so, is it wrapped in a conditional which checks for IsPostBack? The likely culprit is that you're destructively re-populating the page with controls before you get to the button click handler, so all the controls would be present but empty (as in an initial load of the page).
Also, just a note, if you're storing each control in _txt in your loop, why not refer to that variable instead of re-casting on each line. The code in your loop seems to be doing a lot of work for little return.
You need to recreate any dynamically created controls on or before Page_Load or they won't contain postback data.
I'm not entirely clear what happens on DropdownList changed - are you trying to preserve anything that has been entered already based on the textboxes previously generated?
In any event (no pun intended) you need to recreate exactly the same textboxes in or before Page_Load that were there present on the postback, or there won't be data.
A typical way to do this is save something in ViewState that your code can use to figure out what to recreate - e.g. the previous value of the DropDownList. Override LoadViewState and call the creation code there in order to capture the needed value, create the textboxes, then in the DropDownList change event, remove any controls that may have been created in LoadViewState (after of course dealing with their data) and recreate them based on the new value.
edit - i can't figure out how your code works now, you have AddRequiredControl with parameters but you call it with none. Let's assume you have a function AddRequiredControls that creates all textboxes for a given DropDownList1 value, and has this signature:
void AddRequiredControls(int index)
Let's also assume you have a PlaceHolder called ControlsPlaceholder that will contain the textboxes. Here's some pseudocode:
override void LoadViewState(..) {
base.LoadViewState(..);
if (ViewState["oldDropDownIndex"]!=null) {
AddRequiredControls((int)ViewState["oldDropDownIndex"]);
}
}
override OnLoad(EventArgs e)
{
// process data from textboxes
}
void DropDownList1_SelectedIndexChanged(..) {
ControlsPlaceholder.Controls.Clear();
AddRequiredControls(DropDownList1.SelectedIndex);
ViewState["oldDropDownIndex"]=DropDownList1.SelectedIndex;
}