C# 在PageIndex之间维护复选框状态
似乎我错过了一些简单的事情。C# 在PageIndex之间维护复选框状态,c#,page-index-changed,C#,Page Index Changed,似乎我错过了一些简单的事情。 更改页面索引时,复选框不保留状态 .aspx页 <asp:Panel ID="ReassignPanel" runat="server" Width="100%" > </asp:Panel> 代码隐藏 using System.Data; using System.Configuration; using System.Web.Security; using System.Web.UI; using System.We
更改页面索引时,复选框不保留状态 .aspx页
<asp:Panel ID="ReassignPanel" runat="server" Width="100%" >
</asp:Panel>
代码隐藏
using System.Data;
using System.Configuration;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class TasksReassign2_aspx : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
gvTasksList.Visible = true;
DropDownList ddlAssignedTo = (DropDownList)ReassignDetailsView.FindControl("ddlUserAssignedToSelection");
ddlAssignedTo.DataSource = DropDownSource_AssignedTo;
ddlAssignedTo.DataBind();
for (int i = 0; i < ddlAssignedTo.Items.Count; i++)
{
ddlAssignedTo.Items[i].Text = ddlAssignedTo.Items[i].Text.Replace(" (inactive)", "");
}
DropDownList ddlReassign = (DropDownList)ReassignDetailsView.FindControl("ddlUserReassignSelection");
ddlReassign.DataSource = DropDownSource_ReassignTo;
ddlReassign.DataBind();
ddlReassign.SelectedIndex = ddlReassign.Items.IndexOf(ddlReassign.Items.FindByValue(usr.UserID.ToString()));
}
}
private void CheckboxSave()
{
ArrayList array_Tasks = new ArrayList();
for (int index = 0; index < gvTasksList.Rows.Count; index++)
{
bool result = ((CheckBox)gvTasksList.Rows[index].FindControl("cbReassign")).Checked;
if (ViewState["SelectedRecords"] != null)
{
array_Tasks = (ArrayList)ViewState["SelectedRecords"];
}
if (result)
{
if (!array_Tasks.Contains(gvTasksList.Rows[index].Cells[1].Text))
{
array_Tasks.Add(gvTasksList.Rows[index].Cells[1].Text);
}
}
else
{
array_Tasks.Remove(gvTasksList.Rows[index].Cells[1].Text);
}
}
if (array_Tasks != null && array_Tasks.Count > 0) ViewState["SelectedRecords"] = array_Tasks;
}
private void CheckboxPopulate()
{
ArrayList array_Tasks = (ArrayList)ViewState["SelectedRecords"];
if (array_Tasks != null && array_Tasks.Count > 0)
{
for (int index = 0; index < gvTasksList.Rows.Count; index++)
{
if (array_Tasks.Contains(gvTasksList.Rows[index].Cells[1].Text))
{
CheckBox chkbx = (CheckBox)gvTasksList.Rows[index].FindControl("cbReassign");
chkbx.Checked = true;
}
}
}
}
protected void paging_gvTasks(object sender, GridViewPageEventArgs e)
{
CheckboxSave();
gvTasksList.PageIndex = e.NewPageIndex;
gvTasksList.DataBind();
CheckboxPopulate();
}
/****************************************************************************/
protected void evaluateCheckChange(object sender, EventArgs e)
{
if (rblOption.Text == "T") //Taks
{
gvTasksList.PageSize = Convert.ToInt32(((RadioButton)sender).Text);
}
}
protected void Changed_AssignedTo_or_rblOption(object sender, EventArgs e)
{
DropDownList ddlAssignedTo = (DropDownList)ReassignDetailsView.FindControl("ddlUserAssignedToSelection");
ddlAssignedTo.DataSource = DropDownSource_AssignedTo;
UserTasksGridSource.SelectParameters.Clear();
gvTasksList.Visible = false;
if (rblOption.Text == "T")
{
gvTasksList.Visible = true;
LabelHeaderTasks.Text = "Task(s)";
UserTasksGridSource.SelectParameters.Clear();
UserTasksGridSource.SelectParameters.Add("Users_PKID_assigned", TypeCode.Int32, ddlAssignedTo.SelectedValue);
UserTasksGridSource.SelectMethod = "Tasks_GetListByUsers_PKID_assigned_to";
UserTasksGridSource.DataBind();
}
}
}
使用系统数据;
使用系统配置;
使用System.Web.Security;
使用System.Web.UI;
使用System.Web.UI.WebControl;
公共部分类任务分配2_aspx:System.Web.UI.Page
{
受保护的无效页面加载(对象发送方、事件参数e)
{
如果(!IsPostBack)
{
gvTasksList.Visible=true;
DropDownList ddlAssignedTo=(DropDownList)ReassignDetailsView.FindControl(“ddlUserAssignedToSelection”);
ddlsassignedto.DataSource=DropDownSource\u AssignedTo;
ddlsassignedto.DataBind();
对于(int i=0;i0)ViewState[“SelectedRecords”]=array_Tasks;
}
私有void CheckboxPopulate()
{
ArrayList数组_Tasks=(ArrayList)视图状态[“SelectedRecords”];
if(array_Tasks!=null&&array_Tasks.Count>0)
{
对于(int index=0;index
切换GridView的页面索引会导致回发。除非在回发之间存储和加载复选框值,否则需要使用UpdatePanel(AJAX)和相应的AsyncPostbackTrigger
更新:
对不起,我应该读一下你的示例代码。我没有意识到您正在存储复选框值
但是,从分页任务中查看您的代码,我认为它不起作用。页面将在到达分页事件之前重新加载。中断页面加载和分页事件。然后更改GridView的页面并观察发生了什么
页面生命周期:该代码位于CheckboxSave和CheckboxPopulate过程中。我做错了什么?我从@4个不同的摘录中获取了这段代码。我是否做了错误的数据绑定,调用填充代码@错误的时间?所有数据都已正确编译。它只是没有正确填充GridView。它看起来好像是在分页事件之后加载页面。我认为它应该保存当前的检查,加载新页面,然后从存储的“检查”中标记“复选框”@1968PontiacGTORagtop将复选框填充()放入页面加载中。