How to check all, uncheck all, check some options?

Question

1.00/5 (1 vote)

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ASP.NET

<pre lang="c#">
<asp:CheckBoxList ID="Student" class="checkS" align="left" runat="server" 
              onselectedindexchanged="Student_SelectedIndexChanged" AutoPostBack="true" >
                <asp:ListItem Text="Insert"   Value="Insert" ></asp:ListItem>                
                <asp:ListItem Text="Update" Value="Update"></asp:ListItem>
                <asp:ListItem Text="View"   Value="View"></asp:ListItem>
                <asp:ListItem Text="All"    Value="Delete"></asp:ListItem>
            </asp:CheckBoxList>

C#

protected void Student_SelectedIndexChanged(object sender, EventArgs e)
  {

      foreach (ListItem li in Student.Items)
      {
          // li.Selected = true;
          if (li.Text == "All" && li.Selected == true)
          {
              foreach (ListItem li1 in Student.Items)
              {
                  li1.Selected = true;
              }
          }

          if ((li.Text == "Insert" && li.Selected == true)|| (li.Text == "Update" && li.Selected == true))
          {
              Student.Items.FindByText("View").Selected = true;

          }

      }

  }

What I have tried:

1)If we check all==> all checkboxes are selected
2)uncheck all==>all are unchecked
3)if select insert/update view also should select by default view for insert and update

Posted 2-Aug-18 19:15pm

Pr@mod

Updated 2-Aug-18 20:05pm

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Comments

Vincent Maverick Durano 3-Aug-18 12:23pm

I'm looking at your " What I have tried" but I'm struggling to understand what you really want to do? Does your existing code does not work?

1 solution

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dariuskiprotich · Answer 1 · 2018-08-02T20:05:00

I suggest use of jquery to do selecting and unselecting of the checkboxes because 1. It will not result to a postback, 2. You can use checkboxList class -checks- to select all / unselect all.
Example:
$("input[type='checkbox']").change(function () {
if (checkboxname=="checkall") {
if (this.checked) {
$(".checks").prop("checked", true);
}
else {
$(".checks").prop("checked", false);
}
}
if (checkboxname=="checkupdate") {
if (this.checked) {
$(".checks").prop("#checkupdate", true);
$(".checks").prop("#checkview", true);
}
else {
$(".checks").prop("checked", false);
}
}
});