如何保持用户控制值? [英] How to persist user control values?
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问题描述
我要保持用户的控制值
如果我增加一个行previous控制值是不存在的。
If I add one more rows the previous control values is not there
我通过一些网站走了,但我不能清楚地了解
I gone through some sites but I'm not able to understand clearly
code:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ViewState["ControlCount"] = ViewState["ControlCount"] == null ? 2 : ViewState["ControlCount"];
}
}
public int controlCount
{
get
{
int val = 0;
try
{
val = (int)ViewState["ControlCount"];
}
catch (Exception e)
{
// handle exception, if required.
}
return val;
}
set { ViewState["ControlCount"] = value; }
}
在这里,我加入了用户控件
Here I am adding the User controls
protected void addnewtext_Click(object sender, EventArgs e)
{
int i = controlCount++;
for (int j = 0; j <= i; j++)
{
AddVisaControl ac = (AddVisaControl)Page.LoadControl("AddVisaControl.ascx");
Label lb = new Label();
string z = Convert.ToString(j + 1);
lb.Text = "Visa " + z;
rpt1.Controls.Add(lb);
lb.Attributes.Add("class", "style8");
rpt1.Controls.Add(ac);
rpt1.Controls.Add(new LiteralControl("<BR>"))
}
}
AddVisaUserControl.ascx
AddVisaUserControl.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="AddVisaControl.ascx.cs" EnableViewState="false" Inherits="Pyramid.AddVisaControl" %>
<div id="divreg" runat="server">
<table id="tbl" runat="server">
<tr>
<td>
<asp:Label ID="lbl2" runat="server"></asp:Label>
</td>
</tr>
<tr>
<td> Visa Number:</td>
<td><asp:TextBox ID="txtUser" Width="160px" runat="server"/></td>
<td> Country Name:</td>
<td><asp:DropDownList ID="dropCountry" Width="165px" runat="server"></asp:DropDownList></td>
</tr>
<tr>
<td> Type of Visa:</td>
<td><asp:DropDownList ID="dropVisa" Width="165px" runat="server"></asp:DropDownList></td>
<td> Type of Entry:</td>
<td><asp:DropDownList ID="dropEntry" Width="165px" runat="server"></asp:DropDownList></td>
</tr>
<tr>
<td> Expiry Date</td>
<td>
</td>
</tr>
</table>
</div>
任何想法?谢谢advacne
Any ideas? Thanks in advacne
推荐答案
动态控制必须在每次回传被加入,使ViewState中能保持它的价值。有关详细信息,请阅读ASP.NET页面生命周期。
The dynamic controls must be added on every postback, so that ViewState can maintain its values. For more details, please read the ASP.NET page life cycle.
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