I have this web application which is supposed to move rows up and down on button click, but it does only when I close the webpage and re run my program from Visual Studio.
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
DataView view = (DataView)SqlDataSource1.Select(
DataSourceSelectArguments.Empty);
DataTable result = view.ToTable();
}
}
Is this all I need ?
You can use the CommandName to trigger the functionality of your button clicks.
Example: http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.linkbutton.commandargument.aspx
You need to use a button click event. You logic is currently in the page load event, that's why its only firing once
You could also remove the if postback which would also work but is not the recommended solution
protected void Page_Load(object sender, EventArgs e)
{
DataView view = (DataView)SqlDataSource1.Select(DataSourceSelectArguments.Empty);
DataTable result = view.ToTable();
}
Related
In .NET i have a gridview which has to display on the mainpage with default settings. So i put it in pageload code. In the same page i have a "List" button; people choose date etc. and when they press the button gridview loads data from another stored procedure. I put that code under List button event. But after people press List button and gridview comes with the needed data, if they press something else (because of page refresh itself) gridview turns back to default settings.
How do i keep the gridview with wanted data?
protected void Page_Load(object sender, EventArgs e)
{
opsbelgegridview.DataSource = DB.OpsHavuzGetir();
opsbelgegridview.DataBind();
protected void listelebtn_Click(object sender, EventArgs e)
{
opsbelgegridview.DataSource = DB.OpsHavuzDetayListeleBtn(tarih1.ToString("yyyy-MM-dd"), tarih2.ToString("yyyy-MM-dd"), durumdd.SelectedItem.Text.ToString(), islemtipdd.SelectedItem.Text.ToString());
opsbelgegridview.DataBind();
You can use IsPostBack() and only load the initial grid on the first load of the page. Then if the grid data changes it will stay.
private void Page_Load()
{
if (!IsPostBack)
{
opsbelgegridview.DataSource = DB.OpsHavuzGetir();
opsbelgegridview.DataBind();
}
}
I have a textbox "txtName" listbox "listNames" and button "btn_Add". Now i want to populate the textbox with the name selected from the listbox on button click.
I am using asp.net and c#. please help.
do as below
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
//load listbox items here
}
}
if you load data on page load, in every post back your listbox will load again and again, you will lost the selection. Do as above to load data only first time page load. now you can get the list box selected items in button click event.
But this in your button.
txtName.Text = listNames.SelectedItem.Text;
Try this,
On code behind button click event.
txtText.Text = drpDwn.SelectedValue; // This is for ID
txtText.Text = drpDwn.SelectedItem.Text; //This is for Text
Put this on your code behind
protected void Page_Load(object sender, EventArgs e)
{
listNames.Items.Add("listboxItemValue1","Listbox Item Text 1");
listNames.Items.Add("listboxItemValue2","Listbox Item Text 2");
}
protected void btn_Add_Click(object sender, EventArgs e)
{
txtName.Text = listNames.SelectedItem.Text;
}
and this on your Asp,net page
<asp:button ID="btn_Add" runat=server" OnClick="btn_Add_Click" />
Use
textbox.Text= listbox.SelectedItem.ToString();
How can I call a gridview_SelectedIndexChanged event on page load?
Please guide me I'm using asp.net c#
Is this possible to use trigger method on page load?
You can:
protected void Page_Load(object sender, EventArgs e)
{
gridview_SelectedIndexChanged(gridview, null);
}
In my website I wrote that code:
protected void Page_Load(object sender, EventArgs e){ LinkButton lbtnTopicAddress = new LinkButton(); lbtnTopicAddress.Click += lbtnSpecificTopic1_Click;}
protected void lbtnSpecificTopic1_Click(object sender, EventArgs e){ Server.Transfer("~/SpecificTopic.aspx)"
}
But when I press on the link in run time, the caller doesn't go to the EventHandler method.
Why?
Note,
I wrote code like that in many pages in the same website but it work only in one page.
i added that code to many page in website but it worded only in one page every page has its specific code and no relation between them I hope you understand me thanks
I need help pleaseeeeeeee..........................
Did you mean to miss off a ;and a } here?
protected void lbtnSpecificTopic1_Click(object sender, EventArgs e){ Server.Transfer("~/SpecificTopic.aspx)"
I assume you've put a breakpoint in to ensure it isn't being fired?
I'm not exactly sure but I've got a feeling that instead of Page_Load you need to use Page_Init so your code would look this this:
protected void Page_Init(object sender, EventArgs e)
{
LinkButton lbtnTopicAddress = new LinkButton();
lbtnTopicAddress.Click += lbtnSpecificTopic1_Click;
}
protected void lbtnSpecificTopic1_Click(object sender, EventArgs e)
{
Server.Transfer("~/SpecificTopic.aspx");
}
p.s. 5 mins formatting your code can work wonders when trying to debug
Are you adding the button to the controls on your page, or are you trying to find the "lbtnTopicAddress" control on your page?
Simply declaring the button won't do anything -- you have to get a reference to the control itself from the page.
Time for my daily ASP.NET question.
One of my pages shows all of our customer information from a customer table. I want the user to choose whether to see all customer records, or select a specific record from a list. So, my webpage has two radio buttons (show all customers, show specific customer), a listbox (full of customer names), and a formview control. The problem I'm having is getting the formview to update when I change modes via radio buttons or listbox selection (see code below).
Can anyone provide me with some pointers on how to do what I'm trying to do?
protected void Page_Load(object sender, EventArgs e)
{
UpdatePage ();
}
protected void RadioButtonShowAll_CheckedChanged(object sender, EventArgs e)
{
}
protected void RadioButtonShowSelected_CheckedChanged(object sender, EventArgs e)
{
}
protected void DropDownListCustomers_SelectedIndexChanged(object sender, EventArgs e)
{
RadioButtonShowSelected.Checked = true;
UpdatePage ();
}
protected void UpdatePage ()
{
if (RadioButtonShowAll.Checked)
SqlDataSource1.SelectCommand = "SELECT * FROM [Customer] ORDER BY [Company]";
else
SqlDataSource1.SelectCommand = "SELECT * FROM [Customer] WHERE ([CustomerID] = #CustomerID) ORDER BY [Company]";
FormView1.DataBind();
}
First, you only have the SelectedIndexChanged event wired up... In that case, what happens when you change the drop down box is first, Page_Load() fires--which calls UpdatePage(). Then, the event fires, which calls UpdatePage() again. The second time probably doesn't do what you expect.
The fix is to only call UpdatePage() from Page_Load() the first time the page is loaded, but not from postbacks:
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
UpdatePage();
}
Your page has to be updated on Client side, for it to show the new data. You'll need to use Javascript or AJAX and have some variable that keeps track of the need to refresh your page, this way you can send a request to update the page to the server when the Formview needs updating.