我是新手,写的一个多条记录删除的删除事件
删除按钮是与DataGrid分开的下面是删除按钮事件:
private void QKdelete_Click(object sender, System.EventArgs e)
{
for(int i=1;i <=WGQKnum();i++)//WGQKnum()是DataGrid的记录个数
{
if(((CheckBox)WGQK.Items[i].Cells[1].FindControl( "BHQK ")).Checked==true)
{
QKdelete.Attributes[ "onClick "]= "alert(1) ";
}
}
}
但是在运行到:
if(((CheckBox)WGQK.Items[i].Cells[1].FindControl( "BHQK ")).Checked==true)
的时候就无法运行,提示的错误为:
未将对象引用设置到对象的实例。
我就是想判断被选中的复选框是否被选中,选中之后得到那个复选框的值,然后连接数据库删除...
前台的DataGrid中的复选框我是用 <input value= ' <%#DataBinder.Eval(...)%> '/>
代码:
<asp:datagrid id= "WGQK " style= "Z-INDEX: 157; LEFT: 128px; POSITION: absolute; TOP: 80px " runat= "server "
Width= "1000px " AutoGenerateColumns= "False ">
<Columns>
<asp:TemplateColumn HeaderText= "选择 ">
<HeaderStyle HorizontalAlign= "Center " Width= "40px " VerticalAlign= "Middle " Font-Bold= "True "> </HeaderStyle>
<ItemStyle HorizontalAlign= "Center " VerticalAlign= "Middle "> </ItemStyle>
<ItemTemplate>
<span style= "TEXT-ALIGN: center "> <input type=checkbox id= "BHQK " value= ' <%#DataBinder.Eval(Container.DataItem, "编号 ")%> '>
</span>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText= "检查时间 ">
<HeaderStyle HorizontalAlign= "Center " Width= "80px " VerticalAlign= "Middle " Font-Bold= "True "> </HeaderStyle>
<ItemStyle HorizontalAlign= "Center " VerticalAlign= "Middle "> </ItemStyle>
<ItemTemplate>
<%#DataBinder.Eval(Container.DataItem, "检查时间 ")%>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText= "检查内容 ">
<HeaderStyle HorizontalAlign= "Center " Width= "100px " VerticalAlign= "Middle " Font-Bold= "True "> </HeaderStyle>
<ItemStyle HorizontalAlign= "Center " VerticalAlign= "Middle "> </ItemStyle>
<ItemTemplate>
<%#DataBinder.Eval(Container.DataItem, "检查内容 ")%>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText= "检查情况 ">
<HeaderStyle HorizontalAlign= "Center " Width= "100px " VerticalAlign= "Middle " Font-Bold= "True "> </HeaderStyle>
<ItemStyle HorizontalAlign= "Center " VerticalAlign= "Middle "> </ItemStyle&g