c# - 在两个按钮中调用布尔方法不起作用

Question

我有一种bool计算总和（数量*价格）的方法，它工作正常。当我从一个按钮调用该方法时，它工作正常。

protected void btnupdate_Click(object sender, EventArgs e)     
    {
        calculate_sum();
    }

我还需要从不同的按钮再次调用它。所以我试着写这个：

if(calculate_sum())
        {
            something
        }
        else
        {
            something
        }

问题在于第二个按钮它不执行该方法，它只采用在单击按钮之前计算的值btnupdate并且不会再次执行它。

该aspx页面updatepanels包含触发器，也许与此有关？

这是该方法的代码：

public bool calculate_sum()
    {

        bool is_ok = true; ;
        double totalsum = 0;
        int qty = 0; ;
        string p = "";
        for (int i = 0; i < GridView2.Rows.Count; i++)
        {
            if (GridView2.Rows[i].RowType == DataControlRowType.DataRow)
            {
                TextBox txtqty = GridView2.Rows[i].FindControl("lblquantity") as TextBox;

                 p = GridView2.Rows[i].Cells[0].Text.ToString();

                 if (Int32.TryParse(txtqty.Text, out qty))
                 {
                     if (qty > 0)
                     {
                         double pr = Convert.ToDouble(p.ToString());
                         //total per row
                         double tcost = qty * pr;
                         totalsum = totalsum + tcost;
                         GridView2.Rows[i].Cells[6].Text = Convert.ToString((tcost));

                     }
                     else
                     {
                         lblGrandTotal.Visible = true;
                         lblGrandTotal.Text = "enter only numbers greater than 0";
                         lblGrandTotal.ForeColor = System.Drawing.Color.Red;
                         is_ok = false;

                     }
                 }

                     else
                     {
                         lblGrandTotal.Visible = true;
                         lblGrandTotal.Text = "enter only numbers greater than 0";
                         lblGrandTotal.ForeColor = System.Drawing.Color.Red;
                         is_ok = false;
                     }
                 }



        }
        if (is_ok)
        {
            lblGrandTotal.ForeColor = System.Drawing.Color.Black;
            lblGrandTotal.Text = Convert.ToString((totalsum));
            return is_ok;

        }
        else
        {
            return is_ok;
        }

    }

这里是aspx页面：

<%@ Page Title="Check out" Language="C#" MasterPageFile="~/MasterPage/MasterPage.master" AutoEventWireup="true" CodeFile="CheckOut.aspx.cs" Inherits="CheckOut" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

    <asp:ScriptManagerProxy ID="ScriptManagerProxy1" runat="server">
    </asp:ScriptManagerProxy>

    <asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="False" 
        UpdateMode="Conditional">

    <ContentTemplate>



    <asp:HiddenField ID="hfGrandTotal" runat="server"  />
    <asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" >

        <Columns>
        <asp:BoundField DataField="Price" HeaderText="Price" ItemStyle-CssClass="price" >

<ItemStyle CssClass="price"></ItemStyle>
            </asp:BoundField>

                         <asp:TemplateField HeaderText="ProductID" Visible="False">
                <ItemTemplate>
                    <asp:Label ID="lblID" runat="server" Text='<%# Eval("ProductID") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
             <asp:TemplateField HeaderText="ProductName">
                <ItemTemplate>
                    <asp:Label ID="lblName" runat="server" Text='<%# Eval("ProductName") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>

             <asp:TemplateField HeaderText="Summary">
                <ItemTemplate>
                    <asp:Label ID="lblSum" runat="server" Text='<%# Eval("Summary") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
             <asp:TemplateField HeaderText="picPath" Visible="False">
                <ItemTemplate>
                    <asp:Label ID="lblPic" runat="server" Text='<%# Eval("picPath") %>' ></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>

            <asp:TemplateField HeaderText = "quantity">
            <ItemTemplate>
                <asp:TextBox ID="lblquantity" runat="server"  >1</asp:TextBox>

            </ItemTemplate>
        </asp:TemplateField>

        <asp:TemplateField HeaderText = "Total">
            <ItemTemplate>
                <asp:Label ID="lblTotal" runat="server" ></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>

        </Columns>

    </asp:GridView>
        <br />


total sum:
            <asp:Button ID="btnupdate" runat="server" Text="update quantity" 
                onclick="btnupdate_Click" ValidationGroup="panel1" />
<asp:Label ID="lblGrandTotal" runat="server" ></asp:Label>
</ContentTemplate>
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="btnupdate" EventName="Click" />
        </Triggers>
    </asp:UpdatePanel>
    <br />
    <br />
    <br />
    <br />
    <br />

    <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
    <ContentTemplate>


    <asp:Table ID="Table1" runat="server" CellPadding="7" CellSpacing="7" 
        CaptionAlign="Bottom" HorizontalAlign="Center" BorderStyle="Solid" BorderWidth="1" 
                BorderColor="Black" Height="305px" Width="408px">
        <asp:TableHeaderRow BorderStyle="Solid" BorderWidth="1" BorderColor="Black">
        <asp:TableCell ColumnSpan="3" BorderStyle="Solid" BorderWidth="1" BorderColor="Black">customer details</asp:TableCell>
        </asp:TableHeaderRow>

        <asp:TableRow runat="server" >

            <asp:TableCell runat="server" >  
            <asp:TextBox ID="TextBox1" runat="server" Width="150px"></asp:TextBox>
                &nbsp; &nbsp;<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ForeColor="Red" ErrorMessage="חובה" ControlToValidate="TextBox1" Text="requierd" ValidationGroup="panel2"></asp:RequiredFieldValidator>
            </asp:TableCell>

            <asp:TableCell runat="server">    
            <asp:Label ID="Label1" runat="server" Text="name"></asp:Label>
           </asp:TableCell>

        </asp:TableRow>
       <asp:TableRow ID="TableRow1" runat="server">

            <asp:TableCell ID="TableCell1" runat="server">  
            <asp:TextBox ID="TextBox4" runat="server" Width="150px" CausesValidation="True"></asp:TextBox>
            &nbsp; &nbsp;<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ForeColor="Red" ErrorMessage="חובה" ControlToValidate="TextBox4" Text="requierd" ValidationGroup="panel2"></asp:RequiredFieldValidator>
               <br /> <asp:RegularExpressionValidator ID="RegularExpressionValidator1"  runat="server" ErrorMessage="הקלד מספר טלפון" ControlToValidate="TextBox4" ForeColor="Red" ValidationExpression="^(02|03|04|08|09|050|052|054|057|074|077)\-\d{7,8}$"></asp:RegularExpressionValidator>
            </asp:TableCell>

            <asp:TableCell ID="TableCell2" runat="server">    
            <asp:Label ID="Label4" runat="server" Text="phone"></asp:Label>

           </asp:TableCell>
        </asp:TableRow>
        <asp:TableRow runat="server">

            <asp:TableCell runat="server">   

            <asp:TextBox ID="TextBox2" runat="server" Width="150px" CausesValidation="True"></asp:TextBox>
           &nbsp; &nbsp; <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ForeColor="Red"  ErrorMessage="חובה" ControlToValidate="TextBox2" Text="requierd" ValidationGroup="panel2"></asp:RequiredFieldValidator>
            </asp:TableCell>

       <asp:TableCell>
    <asp:Label ID="Label2" runat="server" Text="address"></asp:Label>
    </asp:TableCell>
        </asp:TableRow>
        <asp:TableRow runat="server">

            <asp:TableCell runat="server">
           <asp:TextBox ID="TextBox3" runat="server" Width="150px"></asp:TextBox>
           &nbsp; &nbsp;<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ForeColor="Red" ErrorMessage="חובה" ControlToValidate="TextBox3" Text="requierd" ValidationGroup="panel2"></asp:RequiredFieldValidator>
           <br />
                <asp:RangeValidator ID="RangeValidator1" runat="server" ErrorMessage="only digits" ControlToValidate="TextBox3" ForeColor="Red" MinimumValue="1000" MaximumValue="9999999999999999" ValidationGroup="panel2"></asp:RangeValidator>
            </asp:TableCell>

            <asp:TableCell runat="server">

             <asp:Label ID="Label3" runat="server" Text="number"></asp:Label>
            </asp:TableCell>
        </asp:TableRow>

        <asp:TableRow>
        <asp:TableCell ColumnSpan="3">
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="pay" Width="150" ValidationGroup="panel2" />
        </asp:TableCell>
        </asp:TableRow>

        <asp:TableRow>
        <asp:TableCell ColumnSpan="3">
         <asp:Label ID="lblmessage" runat="server" Text="Label"  
        Font-Size="XX-Large" Visible="False"></asp:Label>

        </asp:TableCell>
        </asp:TableRow>
    </asp:Table>



    <asp:Button ID="btnPrint" runat="server"  Text="print" 
        onclick="btnPrint_Click" Visible="False" />

    </ContentTemplate>
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="btnPrint" EventName="Click" />
        </Triggers>
    </asp:UpdatePanel>
    </asp:Content>

score 1 · Accepted Answer

你的问题还不是很清楚...

您所指的“第二个按钮”是否命名为“Button1”？

如果是这样 - 请注意它位于不同的 UpdatePanel 中，然后是 Grid 和“更新”按钮。当第二个 UpdatePanel 被触发时（从 Button1），在网格中所做的更改（在另一个 UpdatePanel 中）不一定会连同它一起传回服务器。

我会推荐：

暂时删除两个 UpdatePanel 并查看它是否如您所愿。如果是这样，您知道罪魁祸首并将 UpdatePanel 的UpdateMode 更改为 Always 可能会解决您的问题。
如果这不能解决您的问题，请按照@JonSkeet 在评论中的建议进行操作，并创建一个显示问题的简短演示，以便我们更好地帮助您...

c# - 在两个按钮中调用布尔方法不起作用

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