在GridView中选中复选框时如何获取行值

Question

before I asked this I did some checking around to make sure that this doesn't turn out to be a duplicate and ways to get the row values from a row that has a checkbox in its template field...but I can't seem to get it working...So far I have tried

protected void Page_Load(object sender, EventArgs e)
    {
        Entities NW = new Entities();

        var customers =
            from c in NW.Customers
            where (c.ContactName.StartsWith("Ma") || c.ContactName.StartsWith("An")
            || c.ContactName.StartsWith("T")
            || c.ContactName.StartsWith("V")
            )
            orderby c.ContactName ascending
            select new
            {
                c.CustomerID,
                c.ContactName,
                c.CompanyName,
                c.City
            };

        gv1.DataSource = customers.ToList();
        gv1.DataBind();
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        foreach (GridViewRow row in gv1.Rows)
        {
            if (row.RowType == DataControlRowType.DataRow)
            {
                CheckBox chkRow = (row.Cells[0].FindControl("CB") as CheckBox);
                if (chkRow.Checked)
                {
                    Label1.Text = row.Cells[2].Text;
                }
            }
        }
    }

I have stepped through the button click event and when it gets to

if (chkRow.Checked)

its showing as null and skips over it..

my markup is

<asp:GridView ID="gv1" runat="server">
            <HeaderStyle BackColor="SkyBlue" />
            <AlternatingRowStyle BackColor="Yellow" />
            <Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:CheckBox ID="CB" runat="server" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>

when I look at the source after I run, the checkboxes are all named differently than what I gave them the ID of "CB", attached is the pic of the source when its running

I am not sure what I am doing wrong with this

Answer 1

Your GridView should have more columns, because you are referencing Cell[2] in your code.

You might try to use row object to look for your control:

CheckBox chkRow = (row.FindControl("CB") as CheckBox);