RadioButtonList 回发问题
环境:ASP NET 2.0 - 生产服务器没有 Ajax 控件工具包,因此这里没有真正的控件工具包可供使用。
3 个单选按钮列表: 列表一加载,回发后,列表一中的项目用于选择 Lab 值。 一旦选择了实验室值,就会填充第三个单选按钮列表。有一些文本框,但示例中未显示。文本框会根据更改自行回发。如果两个文本框都是 不为空,为会话创建一条记录。
现在,如果第三个单选按钮列表从默认值更改,则会出现一系列 3 个隐藏用户控件,它们代表更改的 3 个级别的原因(数据库中的子/父记录)。
我遇到的问题是,当我在单选按钮列表上选择不同的项目时,单选按钮 3 OnSelectedIndex 在我的用户控件触发后触发。我的用户控件需要第三个列表的值才能访问数据库并获取与实验室关联的正确记录集。
问题是因为直到 Web 控件加载后才处理最后一个单选按钮列表,因此安装用户控件的代码永远不会发生。
下面是基本的 HTML 代码:
<asp:RadioButtonList ID="rdoLab" runat="server" OnSelectedIndexChanged="rdoLab_OnSelectedIndexChange">
</asp:RadioButtonList>
<asp:TextBox ID="textbox1" runat="server" OnTextChanged="TextBoxProcess" />
<asp:TextBox ID="textbox2" runat="server" OnTextChanged="TextBoxProcess" />
<asp:RadioButtonList ID="rdoPrimary" RepeatColumns="3" OnSelectedIndexChanged="rdoPrimary_OnSelectedIndexChanged" runat="server" ToolTip="Select Normal, Hypo or Hyper - Normal is default value." AutoPostBack="True" >
<asp:ListItem Value="3" Text="Normal" Selected="true"/>
<asp:ListItem Value="1" Text="Hypo" />
<asp:ListItem Value="2" Text="Hyper" />
</asp:RadioButtonList>
<asp:Panel ID="UpdLab" runat="server" Visible="true" EnableViewState="true">
<asp:Table ID="tblAdmin" runat="server">
<asp:TableRow>
<asp:TableCell runat="server" id="tblCell1" Visible="false" CssClass="tdCell" VerticalAlign="top">
<uc1:Lab ID="Lab1" runat="server" EnableViewState="true" EnableTheming="true" />
</asp:TableCell>
<asp:TableCell runat="server" ID="tblCell2" Visible="false" CssClass="tdCell" VerticalAlign="top">
<uc1:Lab ID="Lab2" runat="server" EnableViewState="true" EnableTheming="true" />
</asp:TableCell>
<asp:TableCell runat="server" ID="tblCell3" Visible="false" CssClass="tdCell" VerticalAlign="top">
<uc1:Lab ID="Lab3" runat="server" EnableViewState="true" EnableTheming="true" />
</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
这是后面的页面:
protected override void OnPreLoad(EventArgs e)
{
base.OnPreLoad(e);
GetSessionVars();
if (CommonUI.strTest((string)Session["rdoLabs"]) && CommonUI.strTest((string)Session["rdoPrimary"]) && Convert.ToString(hrdoLabs.Value) == (string)Session["rdoLabs"])
{
divLabLvl.Visible = true;
// Get cboListItems from the web user controls...
Session["ArrLstItems"] = "";
ArrayList ArrLstItems = new ArrayList();
ArrayList GetWuc = GetWUCS();
for (int i = 0; i < GetWuc.Count; i++)
{
Lab wuc = (Lab)GetWuc[i];
CheckBoxList cboItemList = (CheckBoxList)wuc.FindControl("cboItems");
string cboItems = GetCboItemList(cboItemList);
HiddenField hcboItems = (HiddenField)wuc.FindControl("hcboItems");
}
Session["ArrLstItems"] = (ArrayList)ArrLstItems;
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DbDataReader ddrGrp = rdoGroups();
if (ddrGrp.HasRows)
{
rdoGroup.DataSource = ddrGrp;
rdoGroup.DataBind();
}
ddrGrp.Close();
}
else
{
DbDataReader ddrLab = rdoUserLabs();
if (ddrLab.HasRows)
{
rdoLabs.DataSource = ddrLab;
rdoLabs.DataBind();
if (CommonUI.strTest((string)Session["rdoLabs"]))
{
if (Convert.ToInt32(Session["rdoLabs"]) > 0)
{
rdoLabs.SelectedValue = (string)Session["rdoLabs"];
SetLabCss();
}
}
}
ddrLab.Close();
}
}
protected void rdoGroup_OnSelectedIndexChanged(object sender, EventArgs e)
{
//...do some stuff
}
protected void rdoLabs_OnSelectedIndexChanged(object sender, EventArgs e)
{
//... reload
}
protected DbDataReader rdoGroups()
{
int group_type_id = GroupTypeId();
Group grp = new Group();
return grp.GetGroups(group_type_id);
}
protected DbDataReader rdoUserLabs()
{
RadioButtonList rdoGrp = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoGroup");
int GroupId = Convert.ToInt32(rdoGrp.SelectedValue);
LabAbnormalReasons lar = new LabAbnormalReasons();
return lar.GetLabsList(GroupId);
}
protected void rdoPrimary_OnSelectedIndexChanged(object sender, EventArgs e)
{
Session["Save"] = ((RadioButtonList)sender).ID;
RadioButtonList rdoGroups = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoGroup");
RadioButtonList rdoLabs = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoLabs");
int UserId = Convert.ToInt32(Session["UserId"]);
int DocId = Convert.ToInt32(Session["DocId"]);
SubmitLab_Data(arrLstItems, arrOthers);
}
protected void GetSessionVars()
{
RadioButtonList rdoGroup = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoGroup");
RadioButtonList rdoPrimary = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoPrimary");
RadioButtonList rdoLabs = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoLabs");
if (rdoGroup.SelectedIndex != -1)
{
Session["rdoGroup"] = (string)rdoGroup.SelectedValue;
}
if (rdoLabs.SelectedIndex != -1)
{
Session["rdoLabs"] = (string)rdoLabs.SelectedValue;
}
if (rdoPrimary.SelectedIndex != -1)
{
Session["rdoPrimary"] = (string)rdoPrimary.SelectedValue;
}
}
这是用户代码的示例:
此代码永远不会触发,因为此处没有第三个按钮列表数据:
protected void Page_Load(object sender, EventArgs e)
{
/////*
//// * lab & Primary have been selected...
//// */
int lvl = SetLvlId();
int par_id = GetParentLvl();
Lab wuc = GetWuc(lvl);
if (wuc != null)
{
if (CommonUI.strTest(Convert.ToString(Session["rdoLabs"])) && CommonUI.strTest(Convert.ToString(Session["rdoPrimary"])))
{
// data in data base for this user, lab, doc identifier...
if (Convert.ToInt32(Session["rdoPrimary"]) > 0
{
// have user hdr data - see if item data is mapped...
// do some stuff here
}
}
}
}
我希望这一点很清楚。 自原始发布以来,我已注意
---*---: 添加了简单的 javascript/OnDataBound 函数主要(对象) { alert("点击值:" + object); }
protected void rdoPrimary_DataBound(对象发送者,EventArgs e) { RadioButtonList rdlPrimary = (RadioButtonList)sender; foreach(rdlPrimary.Items 中的 ListItem li) { li.Attributes.Add("onclick", "javascript:Primary('" + li.Value + "')"); } }
Environment: ASP NET 2.0 - Production Server does not have Ajax Control Toolkit so no real Control toolkit to use here.
3 RadioButtons List:
List one loads, after postback, the item from list one is used to select a Lab value.
Once a lab value is selected a 3rd radiobuttonlist will populate. There are some textboxes but they are not shown in example. The textboxes postback themselves on changes. If both textboxes are
not empty, a record is created for the session.
Now if the 3rd radiobuttonlist is changed from the default a series of 3 hidden user controls appear which represent 3 levels of reasons for the change ( child/parent records in database ).
The problem I am having is when I select a different item on the radiobuttonlist the radiobutton 3 OnSelectedIndex is firing after my user controls fire. My user controls need the value of the 3rd list to go to the database and get the correct set of records associated with the lab.
The problem is because the last radiobuttonlist is not processed until after the web controls loads, the code to mount the user controls never happens.
Here is the basic HTML code:
<asp:RadioButtonList ID="rdoLab" runat="server" OnSelectedIndexChanged="rdoLab_OnSelectedIndexChange">
</asp:RadioButtonList>
<asp:TextBox ID="textbox1" runat="server" OnTextChanged="TextBoxProcess" />
<asp:TextBox ID="textbox2" runat="server" OnTextChanged="TextBoxProcess" />
<asp:RadioButtonList ID="rdoPrimary" RepeatColumns="3" OnSelectedIndexChanged="rdoPrimary_OnSelectedIndexChanged" runat="server" ToolTip="Select Normal, Hypo or Hyper - Normal is default value." AutoPostBack="True" >
<asp:ListItem Value="3" Text="Normal" Selected="true"/>
<asp:ListItem Value="1" Text="Hypo" />
<asp:ListItem Value="2" Text="Hyper" />
</asp:RadioButtonList>
<asp:Panel ID="UpdLab" runat="server" Visible="true" EnableViewState="true">
<asp:Table ID="tblAdmin" runat="server">
<asp:TableRow>
<asp:TableCell runat="server" id="tblCell1" Visible="false" CssClass="tdCell" VerticalAlign="top">
<uc1:Lab ID="Lab1" runat="server" EnableViewState="true" EnableTheming="true" />
</asp:TableCell>
<asp:TableCell runat="server" ID="tblCell2" Visible="false" CssClass="tdCell" VerticalAlign="top">
<uc1:Lab ID="Lab2" runat="server" EnableViewState="true" EnableTheming="true" />
</asp:TableCell>
<asp:TableCell runat="server" ID="tblCell3" Visible="false" CssClass="tdCell" VerticalAlign="top">
<uc1:Lab ID="Lab3" runat="server" EnableViewState="true" EnableTheming="true" />
</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
Here is the page behind:
protected override void OnPreLoad(EventArgs e)
{
base.OnPreLoad(e);
GetSessionVars();
if (CommonUI.strTest((string)Session["rdoLabs"]) && CommonUI.strTest((string)Session["rdoPrimary"]) && Convert.ToString(hrdoLabs.Value) == (string)Session["rdoLabs"])
{
divLabLvl.Visible = true;
// Get cboListItems from the web user controls...
Session["ArrLstItems"] = "";
ArrayList ArrLstItems = new ArrayList();
ArrayList GetWuc = GetWUCS();
for (int i = 0; i < GetWuc.Count; i++)
{
Lab wuc = (Lab)GetWuc[i];
CheckBoxList cboItemList = (CheckBoxList)wuc.FindControl("cboItems");
string cboItems = GetCboItemList(cboItemList);
HiddenField hcboItems = (HiddenField)wuc.FindControl("hcboItems");
}
Session["ArrLstItems"] = (ArrayList)ArrLstItems;
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DbDataReader ddrGrp = rdoGroups();
if (ddrGrp.HasRows)
{
rdoGroup.DataSource = ddrGrp;
rdoGroup.DataBind();
}
ddrGrp.Close();
}
else
{
DbDataReader ddrLab = rdoUserLabs();
if (ddrLab.HasRows)
{
rdoLabs.DataSource = ddrLab;
rdoLabs.DataBind();
if (CommonUI.strTest((string)Session["rdoLabs"]))
{
if (Convert.ToInt32(Session["rdoLabs"]) > 0)
{
rdoLabs.SelectedValue = (string)Session["rdoLabs"];
SetLabCss();
}
}
}
ddrLab.Close();
}
}
protected void rdoGroup_OnSelectedIndexChanged(object sender, EventArgs e)
{
//...do some stuff
}
protected void rdoLabs_OnSelectedIndexChanged(object sender, EventArgs e)
{
//... reload
}
protected DbDataReader rdoGroups()
{
int group_type_id = GroupTypeId();
Group grp = new Group();
return grp.GetGroups(group_type_id);
}
protected DbDataReader rdoUserLabs()
{
RadioButtonList rdoGrp = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoGroup");
int GroupId = Convert.ToInt32(rdoGrp.SelectedValue);
LabAbnormalReasons lar = new LabAbnormalReasons();
return lar.GetLabsList(GroupId);
}
protected void rdoPrimary_OnSelectedIndexChanged(object sender, EventArgs e)
{
Session["Save"] = ((RadioButtonList)sender).ID;
RadioButtonList rdoGroups = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoGroup");
RadioButtonList rdoLabs = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoLabs");
int UserId = Convert.ToInt32(Session["UserId"]);
int DocId = Convert.ToInt32(Session["DocId"]);
SubmitLab_Data(arrLstItems, arrOthers);
}
protected void GetSessionVars()
{
RadioButtonList rdoGroup = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoGroup");
RadioButtonList rdoPrimary = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoPrimary");
RadioButtonList rdoLabs = (RadioButtonList)CommonUI.FindCtrlRecursive(this.Master, "rdoLabs");
if (rdoGroup.SelectedIndex != -1)
{
Session["rdoGroup"] = (string)rdoGroup.SelectedValue;
}
if (rdoLabs.SelectedIndex != -1)
{
Session["rdoLabs"] = (string)rdoLabs.SelectedValue;
}
if (rdoPrimary.SelectedIndex != -1)
{
Session["rdoPrimary"] = (string)rdoPrimary.SelectedValue;
}
}
Here is example of user code:
THIS CODE NEVER FIRES BECAUSE the 3rd Button List data is not available here :
protected void Page_Load(object sender, EventArgs e)
{
/////*
//// * lab & Primary have been selected...
//// */
int lvl = SetLvlId();
int par_id = GetParentLvl();
Lab wuc = GetWuc(lvl);
if (wuc != null)
{
if (CommonUI.strTest(Convert.ToString(Session["rdoLabs"])) && CommonUI.strTest(Convert.ToString(Session["rdoPrimary"])))
{
// data in data base for this user, lab, doc identifier...
if (Convert.ToInt32(Session["rdoPrimary"]) > 0
{
// have user hdr data - see if item data is mapped...
// do some stuff here
}
}
}
}
I hope this is clear. I've att
---*--- Since original posting:
added simple javascript/OnDataBound
function Primary(object)
{
alert("Value Clicked :" + object);
}
protected void rdoPrimary_DataBound(object sender, EventArgs e)
{
RadioButtonList rdlPrimary = (RadioButtonList)sender;
foreach (ListItem li in rdlPrimary.Items)
{
li.Attributes.Add("onclick", "javascript:Primary('" + li.Value + "')");
}
}
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在 SaveViewState 和 LoadViewState 方法中存储和检索您想要保留的值,看看这是否适合您?还要查看较早和较晚的生命周期事件来处理逻辑 - Init 和 OnPreRender。这在过去对我有用。
Store and retrieve the values you want to retain in SaveViewState and LoadViewState methods and see if that works for you? Also look to the earlier and later lifecycle events for handling the logic - Init and OnPreRender. This has worked for me in the past.