gridview模板列数据绑定问题:“
未将对象引用设置到对象的实例。”
我的目标是把gridview模板列中DropDownList1选中的值赋给Label3。 DropDownList1数据绑定成功了。代码如下~~~
//所在区域的绑定;
if (e.Row.RowType == DataControlRowType.DataRow)
{
foreach (GridViewRow row in GridView1.Rows)
{
Label lb = (Label)row.FindControl( "Label3 ");
DropDownList ddl = (DropDownList)row.FindControl( "DropDownList1 ");
lb.Text = ddl.SelectedItem.Text;
}
}
错误提示:lb.Text = ddl.SelectedItem.Text;------:“未将对象引用设置到对象的实例。”
------解决方案--------------------Label lb = (Label)GridView1.FindControl( "Label3 ");
DropDownList ddl = (DropDownList)GridView1.FindControl( "DropDownList1 ");
lb.Text = ddl.SelectedItem.Text;
这样行不 瞎说的
------解决方案-------------------- foreach (GridViewRow i in GridView1.Rows)
{
DropDownList ddl = (DropDownList)GridView1.Rows[i.RowIndex].FindControl( "DropDownList1 ");
Label lb = (Label)GridView1.Rows[i.RowIndex].FindControl( "Label3 ");
lb.Text = ddl.SelectedItem.Text;
}
看看
------解决方案--------------------到底是那个对象是null呢?是ddl.SelectedItem么?
你是在哪个事件里做的,为什么还有在里面做循环??
if (e.Row.RowType == DataControlRowType.DataRow)
{
Label lb = (Label)e.Row.FindControl( "Label3 ");
DropDownList ddl = (DropDownList)e.Row.FindControl( "DropDownList1 ");
lb.Text = ddl.SelectedItem.Text;
}
------解决方案--------------------用e.Row.FindControl