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Listview label into a session variableRSS

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Last post Nov 26, 2015 10:23 AM by chrismusic1979

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chrismusic79
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Listview label into a session variable

Nov 18, 2015 10:43 AM|chrismusic79|LINK
Hi,

After having my previous problem solved here I thought I would again turn to this site for help.

It seems such a simple event, but I can't get it to work correctly. To aid with security I've changed all the names, but the idea is still the same.

I have a aspx wep page that has a label (idlabel). As per my code it currently reads "Nothing".
```
<asp:Label ID="idlabel" runat="server" Text="Nothing"></asp:Label>
```
On Page_Load I can change that label to read "Loaded".
```
protected void Page_Load(object sender, EventArgs e)
        {   idlabel.Text = "Loaded";     }
```
The problem is when I try and change the label again after using a button located within my listview.
```
<asp:ListView ID="ListView1" runat="server" DataKeyNames="ID" OnItemDataBound="ListView1_ItemDataBound"
            DataSourceID="DataSource" OnItemCommand="ListView1_SelectedIndexChanged">
            <ItemTemplate>
                <tr>
                        <td>
                            <asp:Button ID="Button1" runat="server" Text="Change Text" />
                        </td>
                </tr>
            </ItemTemplate>
```
```
protected void ListView1_SelectedIndexChanged(object sender, EventArgs e)
        {
            idlabel.Text = "Changed";
            Response.Redirect("MyPage.aspx");
        }
```
Button uses a command which when using the debug runs with no problems, however the label does not change. The Listview and gridviews contained within (data not posted here) work with no problems.

Hopefully someone can help and let me know where I am going wrong. My overall aim is to put the label into a session variable so I can execute a query with it as a variable.

Thanks in advanced
variable listview label
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budugu
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Re: Listview label into a session variable

Nov 18, 2015 11:27 AM|budugu|LINK

chrismusic79
idlabel.Text = "Changed"; Response.Redirect("MyPage.aspx");

Code redirects to same page(?)...so page_load will execute again

protected void Page_Load(object sender, EventArgs e)
{ idlabel.Text = "Loaded"; }

variable listview label

Vijay Kodali || My Blog

"Don't be afraid to be wrong; otherwise you'll never be right."
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chrismusic79
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Re: Listview label into a session variable

Nov 18, 2015 11:55 AM|chrismusic79|LINK

Hi,

Such a silly mistake. I can't believe I did that. Sorry. I knew I was doing something wrong, but never thought of that. Thank you.

Any idea how to get the ID into a session variable, depending which record is selected?

variable listview label
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budugu
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Re: Listview label into a session variable

Nov 18, 2015 12:42 PM|budugu|LINK
chrismusic79

Any idea how to get the ID into a session variable, depending which record is selected?

Something like this...
```
        protected void ListView1_SelectedIndexChanged(object sender, EventArgs e)
         {
              //if you need index...
               Session["mySelectedValue"] = ListView1.SelectedIndex;
            
         }
```
variable listview label
Vijay Kodali || My Blog

"Don't be afraid to be wrong; otherwise you'll never be right."
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chrismusic79
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Re: Listview label into a session variable

Nov 18, 2015 01:10 PM|chrismusic79|LINK

Hi,

I get "-1" but I need the ID that my listview shows in the first column, which changes every record.

variable listview label
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budugu
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Re: Listview label into a session variable

Nov 18, 2015 09:06 PM|budugu|LINK
chrismusic79
I get "-1" but I need the ID that my listview shows in the first column, which changes every record.

ListView selected items are a collection, can get values like this..
```
if (ListView1.SelectedItems.Count > 0)
{
     var item = ListView1.SelectedItems[0];
     var sValue = item.Value;
}
```
variable listview label
Vijay Kodali || My Blog

"Don't be afraid to be wrong; otherwise you'll never be right."
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Fei Han - MS...
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Re: Listview label into a session variable

Nov 19, 2015 04:38 AM|Fei Han - MSFT|LINK
Hi chrismusic79,

You could save ID field in CommandArgument
```
<asp:Button ID="Button1" runat="server" CommandName="Select" CommandArgument='<%# Eval("ID") %>' Text="Change Text" />
```
Then we could retrieve the value and save it in session variable in ItemCommand event.
```
if (e.CommandName == "Select")
{
    string id = e.CommandArgument.ToString();
    Session["id"] = id;
}
```
Best Regards,

Fei Han
variable listview label
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chrismusic19...
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Re: Listview label into a session variable

Nov 24, 2015 11:41 AM|chrismusic1979|LINK

Hi,

Sorry, can't get into the old account. Had to create a new one.

Using your suggestion I can't seem to get it working. I wonder if we are not on the same wavelength.

My Listview is as per an older thred of mine (http://forums.asp.net/p/2076610/5989505.aspx?Re+Showing+a+gridview+within+a+listview)

I have created a button in each line of the listview which I need to use to access another page, but it's the employeeid in column 1 that I use to bring up the correct data.

Using the 2nd suggestion (below yours) I can get the employeeid as text on the button, but can not manage to get it into a session variable, which is what I want.

Thank you for your time so far.
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oned_gk
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Re: Listview label into a session variable

Nov 25, 2015 07:37 AM|oned_gk|LINK
If you want to change the label text property, you should not change the label text in page_load event in every postback
```
protected void Page_Load(object sender, EventArgs e)
{
  if(!IsPostBack)
  {
    idlabel.Text = "Loaded";
  }
}
   
```
Programming to simplify, don't look for difficult way
Suwandi - Non Graduate Programmer
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chrismusic19...
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10 Posts

Re: Listview label into a session variable

Nov 26, 2015 10:23 AM|chrismusic1979|LINK

Hi,

Thank you Oned_gk for your suggestion, but don't want to change the label text, it's already set as per my employeeID. I need the label to be a session variable. I can normally get it working, it's just it changes on every row.