newbie question

Question

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.

Mahesh Chand · 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 Patel · Answer

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 Uy · Answer

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 Uy · Answer

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 Patel · Answer

Check your Mail Friend your Problem Solved .. :)

Mark Uy · Answer

were you able to get my email?

Mark Uy · Answer

all right i will send them to you. thanks man.

Kirtan Patel · Answer

this Error is Regarding to Your Grdiview Index . mark  can you send me your project Zip in mail ( kirtan007@gmail.com ) . i can resolve it better ..at mine machine .and will be quick also :)

Mark Uy · Answer

help help help!!!

Mark Uy · Answer

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 Patel · Answer

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 Uy · Answer

it didnt :( .. any body else??? please help!!

Adam · Answer

I think your looking for the following: Label3.Text = invoicetotal.ToString(); Hope this helps