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<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AutoGenerateColumns="False" BackColor="White" BorderColor="#CCCCCC"
BorderStyle="None" BorderWidth="1px" CellPadding="4"
DataSourceID="SqlDataSource1" ForeColor="Black" GridLines="Horizontal"
Width="900px">
<Columns>
<asp:TemplateField HeaderText="Date" SortExpression="Date">
<EditItemTemplate>
<asp:TextBox ID="txtStartDate" runat="server" Text='<%# Bind("Date") %>'></asp:TextBox>
<asp:CalendarExtender
ID="CalendarExtender1"
onprerender="AjaxCalendar_PreRender"
runat="server"
TargetControlID="txtStartDate"
Format="dd/MM/yyyy" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
ErrorMessage="Date is required" Font-Italic="True" Font-Size="Small"
ForeColor="Red" ControlToValidate="txtStartDate"></asp:RequiredFieldValidator>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("Date") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Time" SortExpression="Start_Time">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Start_Time") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("Start_Time") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left" />
</asp:TemplateField>
<asp:CommandField ShowEditButton="True">
<ItemStyle ForeColor="#003366" />
</asp:CommandField>
</Columns>
</asp:GridView>
특정 날짜 범위로 캘린더를 설정하고 싶습니다.GridView의 캘린더 프리 렌더링
protected void AjaxCalendar_PreRender(object sender, EventArgs e)
{
DateTime startDate = DateTime.Now.AddDays(1);
DateTime endDate = DateTime.Now.AddDays(60);
CalendarExtender ce = (CalendarExtender)GridView1.FindControl("CalendarExtender1");
ce.StartDate = startDate;
ce.EndDate = endDate;
}
이것은 내가하는 일이지만, 개체 참조가 개체의 인스턴스로 설정되어 있지 않습니다. GridView FindControl이 오류를 일으켰 습니까?
어디에서 예외가 발생합니까? 또한 http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-in-net –
을 참조하십시오. CalendarExtender ce = (CalendarExtender) GridView1.FindControl ("CalendarExtender1"); 이 줄 – user236501