Asp.net Asp RequiredFieldValidator文本属性停止显示，但错误消息仍显示在validationsummary中
我对RequiredFieldValidator文本属性有问题。我的asp web表单有一个面板。在重写的OnPreInit中，我创建了一个带有文本框和RequiredFieldValidator的表，并将其存储到会话变量中，在每次回发时，我将该表保存到该会话中并将其加载。当我运行代码时，验证程序就正常了。通过每次回发，只要未填写文本框且验证摘要显示错误消息，文本属性就会显示在表中。当我填写文本框时，验证器显示正确的valid；文本属性不再显示，validatorsummary不再显示错误。然后，当我删除文本框中的内容并导致回发（单击按钮）时，奇怪的事情发生了。错误消息显示在错误消息中，当我调试RequiredFieldValidator时。IsValid为false。但是文本属性永远不会显示回！？我想我可能缺少viewstate的某些内容，可能是RequiredFieldValidator上的预渲染，或者我保存/恢复会话状态的方式 我已经尝试了我能想到的一切。谢谢你的帮助 aspx.csAsp.net Asp RequiredFieldValidator文本属性停止显示，但错误消息仍显示在validationsummary中,asp.net,webforms,webpage,lifecycle,requiredfieldvalidator,Asp.net,Webforms,Webpage,Lifecycle,Requiredfieldvalidator,我对RequiredFieldValidator文本属性有问题。我的asp web表单有一个面板。在重写的OnPreInit中，我创建了一个带有文本框和RequiredFieldValidator的表，并将其存储到会话变量中，在每次回发时，我将该表保存到该会话中并将其加载。当我运行代码时，验证程序就正常了。通过每次回发，只要未填写文本框且验证摘要显示错误消息，文本属性就会显示在表中。当我填写文本框时，验证器显示正确的valid；文本属性不再显示，validatorsummary不再显示错误。然后
namespace AccessManagementRepeatingTableAsp
{
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Diagnostics;
using System.Drawing;
using System.Globalization;
using System.Linq;
using System.Security;
using System.Transactions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class webform : System.Web.UI.Page
{
private Table testTable = new Table();
protected override void OnPreInit(EventArgs e)
{
if (!this.IsPostBack)
{
TextBox targetTextBox = new TextBox();
string targetTextBoxId = Guid.NewGuid().ToString();
targetTextBox.ID = targetTextBoxId;
RequiredFieldValidator targetRequiredValidator = new RequiredFieldValidator();
targetRequiredValidator.ID = Guid.NewGuid().ToString();
targetRequiredValidator.ForeColor = Color.Red;
targetRequiredValidator.ErrorMessage = "programatic";
targetRequiredValidator.Text = "testvalidator";
targetRequiredValidator.ControlToValidate = targetTextBoxId;
targetRequiredValidator.Display = ValidatorDisplay.Dynamic;
targetRequiredValidator.Visible = true;
TableCell textCell = new TableCell();
textCell.Text = "textCell";
textCell.Controls.Add(targetTextBox);
TableCell validatorCell = new TableCell();
validatorCell.Text = "validatorCell";
validatorCell.Controls.Add(targetRequiredValidator);
TableRow row = new TableRow();
row.Cells.Add(textCell);
row.Cells.Add(validatorCell);
this.testTable.Rows.Add(row);
Session["test"] = this.testTable;
}
else
{
this.testTable = (Table)Session["test"];
RequiredFieldValidator rfv = (RequiredFieldValidator)this.testTable.Rows[0].Cells[1].Controls[0];
rfv.Validate();
Session["test"] = this.testTable;
}
this.testPanel.Controls.Add(this.testTable);
RequiredFieldValidator rfv2 = (RequiredFieldValidator)this.testTable.Rows[0].Cells[1].Controls[0];
rfv2.Validate();
Page.Validate();
base.OnPreInit(e);
}
protected void submitButton_Click(object sender, EventArgs e)
{
Page.Validate();
if (Page.IsValid)
{
this.statusLabel.ForeColor = Color.Blue;
this.statusLabel.Text = "Status: Valid";
}
else
{
this.statusLabel.ForeColor = Color.Red;
this.statusLabel.Text = "Status: Invalid";
}
}
}
}
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AccessManagement.aspx.cs" Inherits="AccessManagementRepeatingTableAsp.webform" %>
<!DOCTYPE html>
<style type="text/css">
div {padding: 0; margin: 0; } /* generated div */
div.centeredDiv {padding: 0; margin: 0; margin-left:auto; margin-right:auto;} /* generated div */
table.tblFormat {margin-left:auto; margin-right:auto;}
td.tdFormat {text-align:left;}
td.tdHidden {visibility:hidden}
.centered { margin-left:auto; margin-right:auto;}
</style>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="Form" runat="server">
<div>
<asp:Button ID="submitButton" runat="server" Text="Submit" OnClick="submitButton_Click" />
<br />
<asp:ValidationSummary ID="ValidationSummary1" runat="server" />
<br />
<asp:Label ID="statusLabel" runat="server" Text="Label"></asp:Label>
<br />
</div>
<asp:Panel ID="testPanel" runat="server">
</asp:Panel>
<br />
</form>
</body>
</html>
div{填充：0；边距：0；}/*生成的div*/
div.centeredDiv{padding:0；margin:0；margin left:auto；margin right:auto；}/*生成的div*/
table.tblFormat{左边距：自动；右边距：自动；}
td.tdFormat{text align:left；}
td.tdHidden{可见性：隐藏}
.centered{左边距：自动；右边距：自动；}
validator.SetRenderMethodDelegate(validator_SetRenderMethodDelegate);
private void validator_SetRenderMethodDelegate(HtmlTextWriter output, Control container)
{
if (!this.IsPostBack)
{
RequiredFieldValidator localRFV = ((RequiredFieldValidator)container);
RequiredFieldValidator tableRFV = (RequiredFieldValidator)this.testTable.Rows[0].Cells[1].Controls[0];
string[] keys = new string[((RequiredFieldValidator)container).Attributes.Count];
localRFV.Attributes.Keys.CopyTo(keys, 0);
foreach (string key in keys)
{
string current = localRFV.Attributes[key];
if (key == "style")
{
localRFV.Attributes.Remove(key);
tableRFV.Attributes.Remove(key);
Session["test"] = this.testTable;
}
}
if (!localRFV.IsValid)
{
output.Write(localRFV.Text);
}
}
}