如何使用javascript乘以文本框值？ [英] How to multiply textbox value using javascript?
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问题描述
我在网格视图控件中有一个文本框，当我输入一些值2,3,4 ..然后它乘以50 ...并且它在标签控件中显示输出...在gridview中也有标签。 。我可以解决它..请帮助我..
代码尝试：
i have a textbox in a grid view control,when i enter some value like 2,3,4 ..then it multiply with 50 ...and it shows output in lable control..here label also in a gridview..how can i solve it..please help me..
Code Tried :
protected void txtrate_TextChanged(object sender, EventArgs e)
{
GridViewRow currentRow = (GridViewRow)(sender as TextBox).Parent.Parent;
float rate = 0;
float kgrate50 = 50;
rate = Convert.ToSingle((sender as TextBox).Text.Trim());
kgrate50 = rate * kgrate50;
(currentRow.Cells[3].FindControl("lbl50kg") as Label).Text = kgrate50.ToString();
GVFeedType.Rows[currentRow.RowIndex + 1].Cells[2].FindControl("txtrate").Focus();
}
Gridview代码
Gridview code
<pre lang="xml"><asp:GridView ID="GVFeedType" runat="server" Style="margin-bottom: 6px" BorderColor="#BDBDBD"
CssClass="center" Width="500px" AutoGenerateColumns="false">
<EmptyDataTemplate>
No Records found</EmptyDataTemplate>
<Columns>
<asp:BoundField HeaderText="SNo" DataField="SNo" ItemStyle-Width="50px" />
<asp:BoundField HeaderText="Feed Type" DataField="FeedType" ItemStyle-Width="200px" />
<asp:TemplateField HeaderText="Rate/Kg" ItemStyle-Width="80px" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
<asp:TextBox ID="txtrate" runat="server" Width="80px" MaxLength="8"
onkeypress="return validatenumerics(event)" OnTextChanged="txtrate_TextChanged"
AutoPostBack="true" />
<asp:RequiredFieldValidator ID="RFVrecdate1" runat="server" ControlToValidate="txtrate"
Display="None" ErrorMessage="Must Enter Rate" ValidationGroup="duereport"></asp:RequiredFieldValidator>
<asp:ValidatorCalloutExtender ID="VCErecdate" runat="Server" TargetControlID="RFVrecdate1" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Rate/50Kg" ItemStyle-Width="80px">
<ItemTemplate>
<asp:Label ID="lbl50kg" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
推荐答案
照顾你的验证和ajax扩展器，我忽略了测试...
using javascript and jquery
Take care of your validations and ajax extenders, i have ignored for testing...
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="jquery-1.10.2.js" type="text/javascript"></script>
<script type="text/javascript">
function calculate(thisobj) {
var textboxValue = thisobj.value + "";
var rate = parseInt(textboxValue);
var
lbl50kg =
lbl50kg =
（' span [id * =lbl50kg]'，
这篇关于如何使用javascript乘以文本框值？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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