I want to update my label content when the user submits a form but it doesn't get updated. Although I have put it in if (!IsPostBack) condition in form load It doesn't show the changes. The only solution that I came up with was defining a counter and increase it in button_click event and check it before label update in !IsPostBack condition. Which is working fine with that.
Is there any other way to update the label text?
Here is my solution:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
if (count > 0)
lblSuccessMsg.Text ="A Message!";
count = 0;
}
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
Save();
count = count + 1;
}
please update your label code outside of !IsPostBack evnt and inside a pageload.
Hard to tell but by the sounds of it you have a submit button and the onclick needs to update this label, something like this should work. I'm using viewstate but session would work here, as would a redirect to the same page with a querystring parameter. Not sure if I've understood your question correctly though.
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
if(Viewstate["updateLabel"] == "true")
{
lblYourLabel.Text = "I'm updated now!";
Viewstate["updateLabel"] = "";
}
}
}
protected void btnYourButton_Click(Object sender, Eventargs e)
{
ViewState["updateLabel"] = "true";
//Do other stuff here if you want
}
Related
i have two radio buttons in an web application named male and female and used the following code to check a button and uncheck other one but it isnt working when i m ruunning it both are selected .what to do?
protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
{
if (RadioButton1.Checked == true)
{
RadioButton2.Checked = false;
}
else
{
RadioButton2.Checked = true;
}
}
protected void RadioButton2_CheckedChanged(object sender, EventArgs e)
{
if (RadioButton2.Checked == true)
{
RadioButton1.Checked = false;
}
else
{
RadioButton2.Checked = true;
}
You should be using a RadioButtonList for this. It will give you radio buttons that belong to the same group and automatically have the behavior that the other buttons in the group are unchecked when a different button in the group is checked.
I think what is happening is when you are doing RadioButton2.Checked =false in
protected void RadioButton1_CheckedChanged(object sender, EventArgs e) you are triggering protected void RadioButton2_CheckedChanged(object sender, EventArgs e) and therfor checking both. Your radio buttons need to be grouped so that they are 1 item and you shouldn't need any code behind to make them work.
I'm trying to set an initial selection for a DropDownList by calling: drop.SelectedIndex = 5 in Page_Load.
This works, but then if I change the selection manually and want to save the form, I'm still getting the initial selection instead of the new selection when calling drop.SelectedValue. What's wrong?
You have forgotten you check if(!IsPostback). Otherwise you will select the 6th item again on postbacks before the SelectedIndexChanged event is triggered (or a button-click event):
protected void Page_Load(Object sender, EventArgs e)
{
if(!IsPostBack) // do this only on the initial load and not on postbacks
dropDwonList1.SelectedIndex = 5;
}
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
//set up data here
}
}
if (Page.IsPostBack)
{
//do page reload logic in here
}
protected void foo(object sender, EventArgs e)
{
//get your selected value here
}
Try this code
You should be using if(!IsPostback) in the Page_Load function.
protected void Page_Load(Object sender, EventArgs e)
{
if(!IsPostBack)
{
drop.SelectedIndex = 5;
//yourcode
}
}
Through this your problem will be solved
on page load i have shown data from database onto a gridview(with edit and delete option). I also have a search button on the page. when i click on search the searched data should be visible in the gridview, which is working fine. But when i click on delete link after search it does not take the searched row. The page postsback after clicking on delete. I need to check the event performed prior to event performed on gridview. How to do that?? I hope that the issue is clear.. Any help is appreciated. Thanks.
Page_Load occurs before RowCommand, are you only binding grid if(!IsPostBack) ?
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
BindGrid();
}
}
protected void SearchButton_Click(object sender, EventArgs e)
{
BindGrid(searchText.Text);
}
protected void GridView_RowCommand(object sender, GridViewRowEventArgs e)
{
switch(e.CommandName)
{
case "Delete":
DeleteRow(e.Row.CommandArgument);
break;
}
}
private void BindGrid()
{
//GridView binding business logic.
}
private void BindGrid(String searchTerm)
{
//GridView binding logic with searchTerm.
}
private void DeleteRow(String commandArg)
{
//Convert command arg to ID or whatever and delete data.
}
How do I do a grdiview on select row event? On the source page, I added
OnSelectedIndexChanged="grdTanks_OnSelectRow"
in the code behind, I put the function
protected void grdTanks_OnSelectRow(Object sender, GridViewCommandEventArgs e)
{
}
When I try to do it that way, I get No overload for grdTanks_OnSelectRow matches delegate 'System.EventHandler'
If I change the GridViewComandEventArgs to EventArgs, then it won't allow me to do
if (e.CommandName == "Select")
anybody know how to do a OnSelectRow event for a gridview? Thanks
I also added this code:
protected void grdTanks_RowDataBound(Object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
if (e.Row.RowIndex != -1)
{
e.Row.Attributes["onmouseover"] = "this.style.cursor='hand';this.style.background='#3260a0';;this.style.color='white'";
if (e.Row.RowIndex % 2 == 1)
{
e.Row.Attributes["onmouseout"] = "this.style.textDecoration='none';this.style.background='white';this.style.color='black'";
}
else
{
e.Row.Attributes["onmouseout"] = "this.style.textDecoration='none';this.style.background='#bEc8bE';this.style.color='black'";
}
e.Row.Attributes["onclick"] = ClientScript.GetPostBackClientHyperlink(this.grdTanks, "Select$" + Convert.ToString(DataBinder.Eval(e.Row.DataItem, "CargoTankID")));
}
}
}
You could try this:
In the page_load, enter
grdTanks.SelectedIndexChanged +=
and press tab twice. Visual Studio automatically generates the handler for you. The second param would be EventArgs
I think you have to change
protected void grdTanks_OnSelectRow(Object sender, GridViewCommandEventArgs e)
To
protected void grdTanks_SelectedIndexChanged(Object sender, GridViewCommandEventArgs e)
In your code behind
I am not sure what you want to do in this event handler. You are already handling for select event and I think, no need to check again for (e.CommandName == "Select"). (MSDN:The SelectedIndexChanged event is raised when a row's Select button is clicked).
The error said no overload for event and you have to use EventArgs argument.
protected void grdTanks_OnSelectRow(Object sender, EventArgs e)
{
// May be you want like..
// Get the currently selected row using the SelectedRow property.
GridViewRow row = YourGridViewID.SelectedRow;
}
i want to creat a web page that uses radiobuttons in a multiple choice quetions, but i want to do is to use a submit button to return the results to the next page with the mark sheet, so can you please help me with that. how to display the mark sheet on the next page using ASP.NET
Use Session state.
For example,
protected void Button1_Click(object sender, EventArgs e)
{
Session["key"] = TextBox1.Text;
Response.Redirect("marksheet.aspx");
}
Code in Page_Load of marksheet.aspx,
protected void Page_Load(object sender, EventArgs e)
{
if (Session["key"] != null)
{
object val = Session["key"];
...
}
}