当我取消选中Child CheckBox时，HeaderCheckBox未取消选中？是什么原因？ [英] When i Unchecked Child CheckBox then HeaderCheckBox is not Unchecked? What is the reason?

问题描述

这是C＃代码..

 受保护  void  ChkAll_CheckedChanged（ object  sender，EventArgs e）
 {
 CheckBox ChkAll =（CheckBox）GridView1.HeaderRow.FindControl（  ChkAll）; 
 
  if （ChkAll.Checked ==  true ）
 { 
  for （ int  i =  0 ; i <  GridView1.Rows.Count; i ++）
 {
 CheckBox chk =（CheckBox）GridView1.Rows [i]。 FindControl（  ChkOne）; 
 chk.Checked =  true ; 
 
} 
} 
  else  
 {
  for （ int  i =  0 ; i <  GridView1.Rows.Count; i ++）
 {
 CheckBox chk =（CheckBox）GridView1.Rows [i] .FindControl（   ChkOne）; 
 chk.Checked =  false ; 
 
 ChkAll.Checked =  false ; 
} 
} 
} 
} 

这是我的ASPX代码

 <   asp：GridView     ID   =  GridView1    runat   =  server    AutoGenerateColumns   =  False  
   
             CssClass  < span class =code-keyword> =  data   宽度  =  50％    AllowSorting   =  True     DataSourceID   = < span class =code-keyword> dsDetails  
   
                < span class =code-attribute>   AllowPaging   =  True    PageSize   =  5 >  
 <  列 >  
 <   asp：TemplateField   >  
 <   HeaderTemplate  >  
 <   asp：CheckBox     ID   =  ChkAll     runat   =  server    AutoPostBack   =  true     oncheckedchanged   =  ChkAll_CheckedChanged  /  >  
 <   / HeaderTemplate  >  
 <   ItemTemplate  >  
 <   asp：CheckBox     ID   =  ChkOne    runat   =  server    AutoPostBack   =  true  /  >  
 <   / ItemTemplate  >  
 < span class =code-keyword><   / asp：TemplateField  >  

解决方案

在.cs页面上创建此活动

------------ -----------------

  protected   void  ChkOne_CheckedChanged（ object  sender，EventArgs e）
 {
  bool  flag =  true ; 
  for （ int  i =  0 ; i <  GridView1.Rows.Count; i ++）
 {
 CheckBox chk =（CheckBox）GridView1.Rows [i]。 FindControl（  ChkOne）; 
  if （！chk.Checked）
 {
 flag =  false ; 
  break ; 
} 
} 
（（CheckBox）GridView1.HeaderRow.FindControl（  ChkAll ））。Checked = flag; 
 
} 

替换.aspx页面上的项目模板代码

----------------------------------------

 <   asp：GridView     ID   =  GridView1    runat   =  server    AutoGenerateColumns   =  False  
   
             CssClass   =  data    宽度  = < span class =code-keyword> 50％    AllowSorting   =  True    DataSourceID   =  dsDetails  
   
                   AllowPaging   =  True    PageSize   =  5 >  
 <   asp：TemplateField  >  
 <   HeaderTemplate  >  
 <   asp：CheckBox     ID   =  ChkAll    runat   =  server    AutoPostBack   =   true    oncheckedchanged  < span class =code-keyword> =  ChkAll_CheckedChanged  /  >  
 <   / HeaderTemplate  >  
 <   ItemTemplate  < span class =code-keyword>>  
 <   asp：CheckBox     ID   =  ChkOne    runat   =  server    AutoPostBack   =  true    oncheckedchanged   =  ChkOne_CheckedChanged  /  >  
 <   / ItemTemplate  >  
 <   / asp ：TemplateField  >  
 <   / asp：GridView  >  

Here Is C# Code..

protected void ChkAll_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox ChkAll = (CheckBox)GridView1.HeaderRow.FindControl("ChkAll");

        if (ChkAll.Checked == true)
        {
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                CheckBox chk = (CheckBox)GridView1.Rows[i].FindControl("ChkOne");
                chk.Checked = true;

            }
        }
        else
        {
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                CheckBox chk = (CheckBox)GridView1.Rows[i].FindControl("ChkOne");
                chk.Checked = false;

                ChkAll.Checked = false;
            }
        }
    }
}

THis is my ASPX Code

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"

     CssClass="data" Width="50%" AllowSorting="True" DataSourceID="dsDetails"

        AllowPaging="True" PageSize="5">
        <Columns>
            <asp:TemplateField>
                <HeaderTemplate>
                    <asp:CheckBox ID="ChkAll" runat="server" AutoPostBack="true" oncheckedchanged="ChkAll_CheckedChanged"/>
                </HeaderTemplate>
                <ItemTemplate>
                    <asp:CheckBox ID="ChkOne" runat="server" AutoPostBack="true"/>
                </ItemTemplate>
            </asp:TemplateField>

解决方案

create this event on .cs page
-----------------------------

protected void ChkOne_CheckedChanged(object sender, EventArgs e)
    {
            bool flag = true;
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                CheckBox chk = (CheckBox)GridView1.Rows[i].FindControl("ChkOne");
                if(!chk.Checked)
                {
                  flag = false;
                  break;
                }
            }
          ((CheckBox)GridView1.HeaderRow.FindControl("ChkAll")).Checked = flag;

    }

replace item template code on .aspx page
----------------------------------------

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"

     CssClass="data" Width="50%" AllowSorting="True" DataSourceID="dsDetails"

        AllowPaging="True" PageSize="5">
 <asp:TemplateField>
                <HeaderTemplate>
                    <asp:CheckBox ID="ChkAll" runat="server" AutoPostBack="true" oncheckedchanged="ChkAll_CheckedChanged"/>
                </HeaderTemplate>
                <ItemTemplate>
                    <asp:CheckBox ID="ChkOne" runat="server" AutoPostBack="true" oncheckedchanged="ChkOne_CheckedChanged"/>
                </ItemTemplate>
            </asp:TemplateField>
</asp:GridView>

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