Question

找不到DATALIST中的控件

我找不到DATALIST中的RadioButton，
//for (int i = 0; i < DataList1.Items.Count; i++)
//{
// RadioButton rb = (RadioButton)DataList1.Items[i].FindControl("rbTop");

// string top;
// if (rb.Checked)
// {
// top = "1";
// }
// else
// {
// top = "0";
// }
rb的返回值是null，怎回事；帮帮我吧
我是新手（新手中的新手），说的清楚一点，最好有代码！！
我想在datalist中看RadioButton 是否被选中；可能是我的逻辑错了，只要能实现效果
protected void DataList1_Update(object source, DataListCommandEventArgs e)
{
for (int i = 0; i < DataList1.Items.Count; i++)
{
RadioButton rb = new RadioButton();
rb = (RadioButton)DataList1.Items[i].FindControl("rbTop");
string top;
if (rb.Checked)
top = "1";
else
top = "0"；
string Site_name = ((TextBox)e.Item.FindControl("TextBox1")).Text;
string Content = ((TextBox)e.Item.FindControl("TextBox2")).Text;
string id = DataList1.DataKeys[e.Item.ItemIndex].ToString();
SqlCommand cmd = new SqlCommand("Update Case_Management Set……,conn);
cmd.ExecuteNonQuery();
DataList1.EditItemIndex = -1;
BindData();
}
}

Answer 1

你弄错事件了，要在itermCommand里边写
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
{
RadioButton rb = (RadioButton)DataList1.Items[i].FindControl("rbTop");
string top;
if (rb.Checked)
{
top = "1";
}
else
{
top = "0";
}

}
这样才能找到时哪一行里边的redio

Answer 2

int count = this.DataList1.Items.Count;
for (int i = 0; i < count; i++)
{
string top;
RadioButton rb = (RadioButton)this.DataList1.Items[i].FindControl("rbTop");
if (rb != null&&rb.Checked)
{
top = "1";
break;
}
if (rb != null&&rb.Checked==false)
{
top = "0";
break;
}

}

找到后,要break退出for

Answer 3

好吧 分拿来吧.累死俺了...几百年没碰C#了..