[Solved] radgrid ItemDataBound event fire twice is it bug?

[zpc]

Test code below:

aspx

<telerik:RadGrid runat="server" ID="rgContents" AutoGenerateColumns="false"
        AllowPaging="true" AllowCustomPaging="true" PageSize="10"
        OnPageIndexChanged="rgContents_PageIndexChanged"
        OnItemDataBound="rgContents_ItemDataBound">
        <MasterTableView>
            <Columns>
                <telerik:GridTemplateColumn>
                    <ItemTemplate>
                        Times: <asp:Literal ID="ltlTimes" runat="server" />
                    </ItemTemplate>
                </telerik:GridTemplateColumn>
            </Columns>
        </MasterTableView>
        <PagerStyle Mode="NextPrevNumericAndAdvanced" />
    </telerik:RadGrid>

asp.cs

private int Times
    {
        get
        {
            return ViewState["Times"] != null ? (int)ViewState["Times"] : 0;
        }
        set
        {
            ViewState["Times"] = value;
        }
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Bind();
        }
    }

    protected void rgContents_PageIndexChanged(object source, GridPageChangedEventArgs e)
    {
        rgContents.CurrentPageIndex = e.NewPageIndex;
        Bind();
    }

    protected void rgContents_ItemDataBound(object sender, GridItemEventArgs e)
    {
        if (e.Item.ItemType == GridItemType.Item || e.Item.ItemType == GridItemType.AlternatingItem)
        {
            Times = Times + 1;
            Literal ltlTimes = e.Item.FindControl("ltlTimes") as Literal;
            ltlTimes.Text = Times.ToString();
        }
    }

    private void Bind()
    {
        var biz = new ContentBiz();
        var contents = biz.GetAll();

        int pageSize = rgContents.PageSize;
        int start = rgContents.CurrentPageIndex * pageSize;
        int count = contents.Count();

        var dataSource = contents.Skip(start).Take(pageSize);

        rgContents.VirtualItemCount = count;
        rgContents.DataSource = dataSource;
        rgContents.DataBind();
    }

when I change page index post back will fire itemdatabound twice.
I am call rgContents.DataBind() in the rgContents_PageIndexChanged, this line code will cause that.
and when use NeedDataSource will correct, but above code why cannot work correct?

[Shinu]

Hello,

 I think the problem is because of calling the DataBind() method after setting the DataSource property. You can refer the Simple data binding demo for more information.

Regards,
Shinu.