[英]How to change/get the text inside a textbox that is in a datalist
我需要得到
1. the text from one textbox
2. according to its value - change the text in another textbox
all of them INSIDE a datalist.
(更具体的说:一个文本框正在获取商品数量,第二个文本框需要显示价格。如果一个单位的价格为20美元,则当用户在数量文本框中输入“ 2”时,它将在商品价格栏中显示40美元价格文本框)。
问题是-我不怎么从一个文本框中接收金额,也没有更改第二个(价格)文本框的值。 你能帮忙吗?
如此先进! :-)
我已经在数据列表中使用了ItemCommand了-问题是我不需要在那里的按钮,因此无法调用该命令。
我还尝试过在第一个文本框中添加“关于文本更改”功能,但之后仍然不知道如何继续。
<asp:DataList ID="dlOrders" runat="server" RepeatColumns="2"
oncancelcommand="dlOrders_CancelCommand"
oneditcommand="dlOrders_EditCommand"
onselectedindexchanged="dlOrders_SelectedIndexChanged"
onupdatecommand="dlOrders_UpdateCommand" >
<ItemTemplate>
<table>
<tr>
<td rowspan="4" style="background-color:black">
<asp:Image ID="flightImg" runat="server" Height="80" ImageUrl='<%# DataBinder.Eval(Container.DataItem,"Pic","Pics/{0}") %>' />
</td>
<td>
<asp:Label ID="txt_id" runat="server" Text="Flight ID" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label1" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_id" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"FightID") %>'></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="txt_date" runat="server" Text="Flight Date" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label2" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_date" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Date") %>'></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="txt_dest" runat="server" Text="Destination" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label3" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_dest" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Des") %>'></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="txt_out" runat="server" Text="Outlet" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label4" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_out" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Outlet") %>'></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Button ID="btn_Order" runat="server" Text="Order" CommandName="Edit" />
</td>
<td>
<asp:Label ID="txt_dur" runat="server" Text="Duration" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label5" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_dur" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Duration") %>'></asp:Label>
</td>
</tr>
<tr>
<td></td>
<td>
<asp:Label ID="txt_kind" runat="server" Text="Kind" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label6" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_kind" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Kind") %>'></asp:Label>
</td>
</tr>
<tr>
<td></td>
<td>
<asp:Label ID="txt_price" runat="server" Text="Price" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label8" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_price" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Price") %>'></asp:Label>
</td>
</tr>
<tr>
<td style="background-color:White" colspan="4">
<asp:Label ID="Label7" runat="server" Text="." ForeColor="White"></asp:Label>
</td>
</tr>
</table>
</ItemTemplate>
<EditItemTemplate>
<table>
<tr>
<td rowspan="4" style="background-color:black">
<asp:Image ID="flightImg" runat="server" Height="80" ImageUrl='<%# DataBinder.Eval(Container.DataItem,"Pic","Pics/{0}") %>' />
</td>
<td>
<asp:Label ID="txt_id" runat="server" Text="Flight ID" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label1" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_id" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"FightID") %>'></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="txt_company" runat="server" Text="Company" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label2" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_company" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Company") %>'></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="txt_sits" runat="server" Text="Available Sits" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label3" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lbl_sits" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Sits") %>'></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="txt_quan" runat="server" Text="Outlet" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label4" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:TextBox ID="quan" runat="server" Text="1" ontextchanged="quan_TextChanged"></asp:TextBox>
</td>
</tr>
<tr>
<td></td>
<td>
<asp:Label ID="txt_price" runat="server" Text="Total Price" Font-Bold="true" Font-Underline="true"></asp:Label>
</td>
<td>
<asp:Label ID="Label9" runat="server" Text=":" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:TextBox ID="total_price" runat="server" Enabled="false" Text='<%# DataBinder.Eval(Container.DataItem,"Price") %>'></asp:TextBox>
</td>
</tr>
<tr>
<td></td>
<td>
<asp:Button ID="btn_confirm" runat="server" Text="Confirm" CommandName="Update" />
</td>
<td>
<asp:Button ID="btn_cancel" runat="server" Text="Cancel" CommandName="Cancel" />
</td>
</tr>
</table>
</EditItemTemplate>
</asp:DataList>
我在第一个文本框中添加了“关于文本更改”功能:
protected void quan_TextChanged(object sender, EventArgs e)
{
TextBox t = (TextBox)sender;
DataListItem item = (DataListItem)t.NamingContainer;
int amount = int.Parse(((TextBox)item.FindControl("quan")).Text);
DataTable dt = se.GetAllFlights();
string price = dt.Rows[item.ItemIndex][4].ToString();
int pos = price.IndexOf("$");
price = ((int.Parse(price.Substring(0, pos))) * (int.Parse(t.Text))).ToString() + "$";
dt.Rows[item.ItemIndex][4] = price.ToString();
dlOrders.DataSource = dt;
dlOrders.DataBind();
}
我已经更改了与该文本框相关联的数据表中的值,而不是使用寻找方法来更改第二个文本框中的文本。
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