Gridview页脚计算器 [英] Gridview Footer calculator

问题描述

大家好

试图创建一个页脚计算器.现在的问题是，跳过了if()statemets.这有什么想法吗?检查以下代码:

Hi guys

Trying to create a footer calculator. Problem is now the if() statemets are skiped. any ideas Y this hapens? Check the code below:

protected void grvTravelClaims_RowDataBound(object sender, GridViewRowEventArgs e)
{
    decimal _total = 0.0M;
    int totalItems = 0;
  
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        Label lblKillometers = (Label)e.Row.FindControl("lblKillometers");
        decimal killometers = Decimal.Parse(lblKillometers.Text);
        _total += killometers;
        totalItems += 1;
       
    }
    if (e.Row.RowType == DataControlRowType.Footer)
    {
        Label lblTotalKillometers = (Label)e.Row.FindControl("lblTotalKillometers");
        lblTotalKillometers.Text = _total.ToString();
    }
}

推荐答案

必须在每次回发中重新创建动态创建的控件.从您发布的代码看来，您可以改为在标记中执行此操作.如果不是，则必须在每次回发中重新创建动态控件.

您的标记代码应为:

Dynamically created controls must be re-created on every postback. From the code you posted it appears that you could do this in markup instead. If not, you''ll have to re-create the dynamic controls on every postback.

Your mark up code should be:

    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"          OnRowCommand="GridView1_RowCommand"          OnRowEditing="GridView1_RowEditing"/>
}

关键是您需要将代码从Page_Load移到Page_Init.在Page_Load中添加的内容仅可用于一次回发的生命周期.

Key thing is that you need to move your code from Page_Load to Page_Init. Things added in the Page_Load last only for the lifecycle of one postback.

protected void Page_Load(object sender, EventArgs e)
{
     BindGridView(); 
}

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