我有一个显示我们当前项目的列表视图。
在列表视图的 itemediting 事件处理程序中，我有许多使用嵌套转发器呈现的复选框。渲染后，我遍历所有复选框并根据从数据库中检索到的数据设置正确的状态。
我的想法是我可以选中或取消选中任何复选框，并将更改保存在数据库中。
我的问题在于 itemupdating 事件处理程序：我无法保留已更改的复选框状态。我重新绑定了嵌套的中继器，但这似乎覆盖了编辑期间设置的复选框状态。
任何关于如何在列表视图的edititemtemplate中保留由转发器生成的复选框状态的指针将不胜感激！
谢谢 斯蒂金
【问题讨论】：
首先我在 itemediting 处绑定 rptDepts 中继器
Public Sub lvProjects_OnItemEditing(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ListViewEditEventArgs)
Dim rptDepts As Repeater = lvProjects.EditItem.FindControl("rptDepts")
rptDepts.DataSource = bllDept.getServices()
rptDepts.DataBind()
'get tasks for projectID
Dim hdnprojectID As HiddenField = lvProjects.EditItem.FindControl("hdnStudyID")
getTasks(hdnProjectID.Value, rptDepts)
End Sub
然后当rptDepts被数据绑定时，我绑定rptTasks中继器
Protected Sub lvDepts_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs)
'get tasks for service
Dim rptTasks As Repeater = e.Item.FindControl("rptTasks")
rptTasks.DataSource = bllDept.getTasksForService(e.Item.DataItem("pk_dept_id"))
rptTasks.DataBind()
End Sub
然后，在 itemupdating 时，我重新绑定 rptDepts（你说我不应该这样做
Public Sub lvProjects_OnItemUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ListViewUpdateEventArgs)
'this item
Dim itmProject As ListViewItem = lvProjects.Items(e.ItemIndex)
'rebind depts
'Dim rptDepts As Repeater = itmProject.FindControl("rptDepts")
'rptDepts.DataSource = bllDept.getServices()
'rptDepts.DataBind()
'update project
bllProject.updateProject(itmProject, lblTest)
'unset edit status
lvProjects.EditIndex = -1
'success message
pnlFeedback.CssClass = "success"
ltlFeedback.Text = "Project <b>" & txtName.Text & "</b> was successfully updated."
'rebind
bindProjects()
End Sub
但在 bllProject.updateProject 方法中，我需要能够引用复选框以将更改保存到数据库
【讨论】：
如果您重新绑定嵌套中继器，它们将从原始数据源更新（覆盖您的更改）。尽量不要重新绑定。
【讨论】：
Checked='<%# Eval("PreAcqClaim") ==DBNull.Value?false:true %>' MARKUP
------------------CODE BEHIND--------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Claim : System.Web.UI.Page
{
CheckBox OurFaultCheckBox = new CheckBox();
CheckBox PicturesCheckBox = new CheckBox();
CheckBox ReportedInsCheckBox = new CheckBox();
CheckBox ReportLateCheckBox = new CheckBox();
CheckBox AssistRepairCheckBox = new CheckBox();
CheckBox LitigationCheckBox = new CheckBox();
CheckBox PreAcqClaimCheckBox = new CheckBox();
DetailsDataTableAdapters.tblClaimsTableAdapter _adapter = new DetailsDataTableAdapters.tblClaimsTableAdapter();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
lvDetails.DataSource = _adapter.GetDataByPK_Claim_ID(Convert.ToInt32(Request.QueryString["PK_Claim_ID"]));
lvDetails.DataBind();
}
}
protected void objDetails_Selecting(object sender, ObjectDataSourceSelectingEventArgs e)
{
}
protected void lvDetails_ItemDataBound(object sender, ListViewItemEventArgs e)
{
//CheckBox OurFaultCheckBox = (CheckBox)lvDetails.FindControl("OurFaultCheckBox");
//OurFaultCheckBox.Checked = true;
//OurFaultCheckBox = (CheckBox)e.Item.FindControl("OurFaultCheckBox");
//PicturesCheckBox = (CheckBox)e.Item.FindControl("PicturesCheckBox");
//ReportedInsCheckBox = (CheckBox)e.Item.FindControl("ReportedInsCheckBox");
//ReportLateCheckBox = (CheckBox)e.Item.FindControl("ReportLateCheckBox");
//AssistRepairCheckBox = (CheckBox)e.Item.FindControl("AssistRepairCheckBox");
//LitigationCheckBox = (CheckBox)e.Item.FindControl("LitigationCheckBox");
//PreAcqClaimCheckBox = (CheckBox)e.Item.FindControl("PreAcqClaimCheckBox");
}
protected void objDetails_Inserting(object sender, ObjectDataSourceMethodEventArgs e)
{
CheckBox OurFaultCheckBox = (CheckBox)lvDetails.FindControl("OurFaultCheckBox");
e.InputParameters.Add("OurFaultCheckBox", OurFaultCheckBox.Checked);
}
protected void objDetails_Updating(object sender, ObjectDataSourceMethodEventArgs e)
{
e.InputParameters.Add("OurFault", OurFaultCheckBox.Checked);
e.InputParameters.Add("Pictures", PicturesCheckBox.Checked);
e.InputParameters.Add("ReportedIns", ReportedInsCheckBox.Checked);
e.InputParameters.Add("ReportLate", ReportLateCheckBox.Checked);
e.InputParameters.Add("AssistRepair", AssistRepairCheckBox.Checked);
e.InputParameters.Add("Litigation", LitigationCheckBox.Checked);
e.InputParameters.Add("PreAcqClaim", PreAcqClaimCheckBox.Checked);
}
protected void lvDetails_ItemUpdating(object sender, ListViewUpdateEventArgs e)
{
DetailsDataTableAdapters.tblClaimsTableAdapter _adapter = new DetailsDataTableAdapters.tblClaimsTableAdapter();
OurFaultCheckBox = (CheckBox)lvDetails.EditItem.FindControl("OurFaultCheckBox");
PicturesCheckBox = (CheckBox)lvDetails.EditItem.FindControl("PicturesCheckBox");
ReportedInsCheckBox = (CheckBox)lvDetails.EditItem.FindControl("ReportedInsCheckBox");
ReportLateCheckBox = (CheckBox)lvDetails.EditItem.FindControl("ReportLateCheckBox");
AssistRepairCheckBox = (CheckBox)lvDetails.EditItem.FindControl("AssistRepairCheckBox");
LitigationCheckBox = (CheckBox)lvDetails.EditItem.FindControl("LitigationCheckBox");
PreAcqClaimCheckBox = (CheckBox)lvDetails.EditItem.FindControl("PreAcqClaimCheckBox");
try
{
_adapter.Update("eventNum", "jobNum","test", "1", DateTime.Now, "", "", "",
"", "", "", DateTime.Now, "", "", "", "54143", "", "", "",
OurFaultCheckBox.Checked, PicturesCheckBox.Checked,
ReportedInsCheckBox.Checked, ReportLateCheckBox.Checked,
AssistRepairCheckBox.Checked, LitigationCheckBox.Checked,
PreAcqClaimCheckBox.Checked,
Convert.ToInt32(Request.QueryString["PK_Claim_ID"]));
}
catch (Exception ex)
{
}
lvDetails.EditIndex = -1;
}
protected void ObjectDataSource1_Selecting(object sender, ObjectDataSourceSelectingEventArgs e)
{
}
protected void lvDetails_ItemEditing(object sender, ListViewEditEventArgs e)
{
lvDetails.EditIndex = e.NewEditIndex;
}
}
【讨论】：