这两天遇到ListBox数据绑定并显示的问题,以前以为可以根ASP.NET中的用法差不多,即
ListBox listBox;
listBox.DataSource = ds;
listBox.DataTextField = "要显示的字段名";
listBox.DataValueField = "id";
listBox.DataBind();
然后利用listBox.SelectedItem即可访问被选中的项的值,当然在WinForm中除了DataSource的属性还有,其他都没有了,WinForm就换成如下方式:
listBox.DataSource = ds.Tables[0];
listBox.DisplayMember = "carsnumber";
listBox.ValueMember = "id";
这样便可在ListBox正确显示出来,并且利用listBox.SelectedValue可以得到选定项的对应的id, 但是当我用
listBox.SelectedItem打算得到相应的carsnumber值时,确显示System.Data.DataRowView,利用listBox.Item[]访问得到的结果是一样的。最后在网上搜搜看能不能找到答案,又在CSDN上搜了一下以前的帖子,最后找到了答案,
如果要循环访问绑定了的Text值和Value 值,可用如下方式:
for( int i = 0; i < listBox.Items.Count; i++ )
{
DataRowView drv = listBox.Items[i] as DataRowView;
if( drv != null )
{
MessageBox.Show( "Text:" + drv[listBox.DisplayMember].ToString() );
MessageBox.Show( "Value:" + drv[listBox.ValueMember].ToString() );
}
}
看来如果没有网络在学习的道路上还真不好走。。。
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listBox.SelectedItem打算得到相应的carsnumber值时,确显示System.Data.DataRowView,利用listBox.Item[]访问得到的结果是一样的。最后在网上搜搜看能不能找到答案,又在CSDN上搜了一下以前的帖子,最后找到了答案,
如果要循环访问绑定了的Text值和Value 值,可用如下方式:
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