newbie question

Mark Uy

i have a button that will extract 2 columns from a selected row (the button is not a buttonfield btw, its a standalone asp button).

the first column was easy as the datatypes were string. the second one is a little tricky (for me that is) as im trying to extract the "unit price" from the selectedrow (gridview1.selectedrow.cells[5]) in my case. im using a label that will display the cumulative unit price from all the selected rows

heres a code that i was trying but as obvious, it has problems with datatypes.

        int invoicetotal;
        int unitprice;

        unitprice = GridView1.SelectedRow.Cells[5];

        invoicetotal = invoicetotal + unitprice;

        Label3.Text = invoicetotal;

what i want is that every time i click on the button, the label will display the total amount of the prices that were selected.

thanks.

13 Replies

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Mahesh Chand17y ago
Accepted answer
When you debug your code, what do you see the value of invoicetotal? Does this even has any data in it? I am assuming the code you written previously is on the button click event handler.
Kirtan Patel17y ago
Friend,

I solved it Without using that label value ..

Problem was PostBack of Button.

put the GridView1.DataBind() like below

if(!IsPostBack)
{

GridView1.DataBind();

}

and please check "Do you like this answer" check box :)
Mark Uy17y ago
i think i got it.

instead of declaring a variable = 0;

i used a default label value instead.

decimal unitprice;
        decimal invoicetotal = Convert.ToDecimal(Label4.Text);
            unitprice = Convert.ToDecimal(Label3.Text);
            invoicetotal = unitprice + invoicetotal;
            Label4.Text = invoicetotal.ToString();

its working now.

thank god for labels.
Mark Uy17y ago
man, i think it didnt work since the reason why i set cells[5] instead of cells[6] because i left the unit ID column hidden in my datagridview. what you did was set the datagrid to its default autogenerated apperance.

i have 2 labels to check the unitserial column and the unit price column.

protected void GridView1_SelectedIndexChanged1(object sender, EventArgs e)
    {
        Label1.Text = GridView1.SelectedRow.Cells[1].Text;
        Label3.Text = GridView1.SelectedRow.Cells[5].Text;
    }

and they are pointing to the correct values upon select on the gridview.

and also i think the problem lies here:

int invoicetotal = 0;

as the invoicetotal reverts back to 0 everytime i click on the button.

im back to square one :( . . .
Kirtan Patel17y ago
Check your Mail Friend,

your Problem Solved .. :)
Mark Uy17y ago
were you able to get my email?
Mark Uy17y ago
all right, i will send them to you. thanks man.
Kirtan Patel17y ago
this Error is Regarding to Your Grdiview Index .

mark , can you send me your project Zip in mail ( [email protected] )

. i can resolve it better ..at mine machine .and will be quick also :)
Mark Uy17y ago
help help help!!!
Mark Uy17y ago
that was a quick one.

i tried what kirtan said and and thanks for reminding me to declare a variable as 0 if it will be use in a math algorithm. now i forgot to mention that the datatype for the unit price was "money" so it was displaying some decimal places in there.

i tried convertodecimal (as well as convert.toint) but got an error = "Index was out of range. Must be non-negative and less than the size of the collection.Parameter name: index". after clicking the button once.

so i tried switching to double where i was able to click once without an error, but got the same error message when i tried to click on the button the 2nd time.

what should i do to fix the error??
Kirtan Patel17y ago
Hii Mark,

you should Write like below

protected void Button1_Click(object sender, EventArgs e)

    {

        int unitprice;

        int invoicetotal=0;

        unitprice = Convert.ToInt32(GridView1.SelectedRow.Cells[5].Text);

        invoicetotal = invoicetotal + unitprice;

        Label1.Text = invoicetotal.ToString();

    }

if still need help then let me know :)
Mark Uy17y ago
it didnt :( ..

any body else??? please help!!
Adam17y ago
I think your looking for the following:
Label3.Text = invoicetotal.ToString();

Hope this helps