CheckBox check uncheck based on another column in Gridview in ASP.Net

Here, I have created Sample code that will help you.

HTML

<div>
    <asp:GridView ID="gvattendence" runat="server" AutoGenerateColumns="false" OnRowEditing="gvattendence_RowEditing"
        OnRowDataBound="gvattendence_RowDataBound">
        <Columns>
            <asp:TemplateField HeaderText="StudentId">
                <ItemTemplate>
                    <asp:Label ID="lblStudentId" Text='<%#Eval("StudentId") %>' runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="StudentName">
                <ItemTemplate>
                    <asp:Label ID="lblStudentName" Text='<%#Eval("StudentName") %>' runat="server" />
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="txtStudentName" Text='<%#Eval("StudentName") %>' runat="server"></asp:TextBox>
                </EditItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Status">
                <ItemTemplate>
                    <asp:Label ID="lblStudentStatus" Text='<%#Eval("Status") %>' runat="server" />
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:Label ID="lblStudentStatus" Text='<%#Eval("Status") %>' Visible="false" runat="server" />
                    <asp:CheckBox ID="chkpresent" runat="server" />
                </EditItemTemplate>
            </asp:TemplateField>
            <asp:CommandField ShowEditButton="true" />
        </Columns>
    </asp:GridView>
</div>

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        this.GetStudentsDetails();
    }
}

private void GetStudentsDetails()
{
    DataTable dt = new DataTable();
    dt.Columns.Add("StudentId", typeof(int));
    dt.Columns.Add("StudentName", typeof(string));
    dt.Columns.Add("Status", typeof(string));
    dt.Rows.Add(1, "John", "Present");
    dt.Rows.Add(2, "Peter", "Absent");
    gvattendence.DataSource = dt;
    gvattendence.DataBind();
}

protected void gvattendence_RowEditing(object sender, GridViewEditEventArgs e)
{
    gvattendence.EditIndex = e.NewEditIndex;
    this.GetStudentsDetails();
}

protected void gvattendence_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow && gvattendence.EditIndex == e.Row.RowIndex)
    {
        CheckBox chekpresent = (e.Row.FindControl("chkpresent") as CheckBox);
        string status = (e.Row.FindControl("lblStudentStatus") as Label).Text;
        if (status == "Present")
        {
            chekpresent.Checked = true;
        }
        else if (status == "Absent")
        {
            chekpresent.Checked = false;
        }
    }
}

VB

Protected Sub Page_Load(sender As Object, e As EventArgs)
	If Not Me.IsPostBack Then
		Me.GetStudentsDetails()
	End If
End Sub

Private Sub GetStudentsDetails()
	Dim dt As New DataTable()
	dt.Columns.Add("StudentId", GetType(Integer))
	dt.Columns.Add("StudentName", GetType(String))
	dt.Columns.Add("Status", GetType(String))
	dt.Rows.Add(1, "John", "Present")
	dt.Rows.Add(2, "Peter", "Absent")
	gvattendence.DataSource = dt
	gvattendence.DataBind()
End Sub

Protected Sub gvattendence_RowEditing(sender As Object, e As GridViewEditEventArgs)
	gvattendence.EditIndex = e.NewEditIndex
	Me.GetStudentsDetails()
End Sub

Protected Sub gvattendence_RowDataBound(sender As Object, e As GridViewRowEventArgs)
	If e.Row.RowType = DataControlRowType.DataRow AndAlso gvattendence.EditIndex = e.Row.RowIndex Then
		Dim chekpresent As CheckBox = TryCast(e.Row.FindControl("chkpresent"), CheckBox)
		Dim status As String = TryCast(e.Row.FindControl("lblStudentStatus"), Label).Text
		If status = "Present" Then
			chekpresent.Checked = True
		ElseIf status = "Absent" Then
			chekpresent.Checked = False
		End If
	End If
End Sub

Screenshot

I hope this code help you.