CODEWITHSUNDEEP
c#asp.net.netgridview
user1173169
user1173169

Reputation:

Cannot get data from my gridview

I have problems to get the data of a particular cell in my gridview i'm doing it this way :

double total = 0;

for (int i = 0; i < GridFactures.Rows.Count; i++)
    total += Convert.ToDouble(GridFactures.Rows[i].Cells[6].Text.ToString());

lblTotalTTC.Text = "Montant total TTC : " + total;

The column in question is declared in my aspx file :

<asp:TemplateField HeaderText="Montant TTC">
    <ItemTemplate>
        <asp:Label ID="lblMontantTTC" runat="server" Text='<%#Eval("MontantTTC") %>'/>
    </ItemTemplate>
</asp:TemplateField>

i'm sure this is always the sixth column i want to check. i put a break and GridFactures.Rows[i].Cells[6].Text.ToString()always contains "" nothing more ... thanks for your help

Upvotes: 0

Views: 750

Answers (5)

Vano Maisuradze
Vano Maisuradze

Reputation: 5899

Instead of this code:

for (int i = 0; i < GridFactures.Rows.Count; i++)
    total += Convert.ToDouble(GridFactures.Rows[i].Cells[6].Text.ToString());

Try this:

for (int i = 0; i < GridFactures.Rows.Count; i++)
{
    Control ctrl = GridFactures.Rows[i].Cells[6].FindControl("lblMontantTTC");
    if (ctrl != null)
    {
        Label lbl = ctrl as Label;
        if (lbl != null)
        {
            total += Convert.ToDouble(lbl.Text);
        }
    } 
}

Upvotes: 1

p.campbell
p.campbell

Reputation: 100567

How about use LINQ instead of looping?

double mySum = 
        GridFactures.Rows
                    .Cast<GridViewRows>()
                    .Sum(row =>  
                Double.Parse(((Label)row.FindControl("lblMontantTTC")).Text));

If you're seeing no values, then your grid actually hasn't been databound yet, or ViewState is disabled on the grid. This all depends on where/when you're performing this calculation in the page lifecycle.

Upvotes: 0

BinBin
BinBin

Reputation: 86

I know why. I just ran into the same situation myself. You need to check fields that are empty, if so, convert it to zero first. 

   total += (GridFactures.Rows[i].Cells[6].Text == "")? 0d : Convert.ToDouble(GridFactures.Rows[i].Cells[6].Text.ToString());

Upvotes: 0

Black Moose
Black Moose

Reputation: 16

If I'm not mistaken (and your label is the first/only control in the cell) -

You need to ask for the control at index 0, or find it by id, then ask for the .Text

Like so:

GridFactures.Rows[i].Cells[6].Controls[0].Text.ToString()

Upvotes: 0

RhysW
RhysW

Reputation: 453

remember it is a zero based index, so [6] means cell 7

Upvotes: 0

Related Questions