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서버 측의 RadioButtonList에 "onclick"속성을 추가하지만 버튼을 클릭하면왜 RadioButtonList 속성이 포스트 백을 잃었습니까?
포스트 백을 제출하면 속성이 손실됩니다.
여기
를 해결하기 위해 좀 도와주세요 것은=== HTML의 ===
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:RadioButtonList ID="RadioButtonList1" runat="server"
RepeatLayout="Flow" RepeatDirection="Horizontal" />
<br />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>
</body>
</html>
======= ASP.NET ==== 내 샘플 코드 ====
protected override void LoadViewState(object savedState)
{
if (savedState != null)
{
object[] myState = (object[])savedState;
// restore base first
if (myState[0] != null)
{
base.LoadViewState(myState[0]);
}
Int32 i = 1;
foreach (ListItem li in this.Items)
{
// loop through and restore each style attribute
foreach (string[] attribute in (string[][])myState[i++])
{
li.Attributes[attribute[0]] = attribute[1];
}
}
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
SetList();
TextBox1.TextMode = TextBoxMode.Password;
TextBox1.Attributes.Add("value", "123");
}
}
void SetList()
{
List<ListItem> items = new List<ListItem>();
items.Add(new ListItem { Text = "Yes", Value = "1" });
items.Add(new ListItem { Text = "No", Value = "0" });
RadioButtonList1.DataSource = items;
RadioButtonList1.DataBind();
for (int i = 0; i < RadioButtonList1.Items.Count; i++)
{
RadioButtonList1.Items[i].Attributes.Add("onclick", "Hello()");
}
}
protected override object SaveViewState()
{
// create object array for Item count + 1
object[] allStates = new object[this.Items.Count + 1];
// the +1 is to hold the base info
object baseState = base.SaveViewState();
allStates[0] = baseState;
Int32 i = 1;
// now loop through and save each Style attribute for the List
foreach (ListItem li in this.Items)
{
Int32 j = 0;
string[][] attributes = new string[li.Attributes.Count][];
foreach (string attribute in li.Attributes.Keys)
{
attributes[j++] = new string[] { attribute, li.Attributes[attribute] };
}
allStates[i++] = attributes;
}
return allStates;
}