comboBox的值拿不下来? 一下两段代码label20.Text = comboBox2.SelectedValue.ToString(); 这个正常,而这段 string num = "sDID=" + comboBox2.SelectedValue.ToString (); 却不正常,断点发现他的值是 :"sDID=System.Data.DataRowView" 怎么拿得他下来? 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 string num = "sDID=" + comboBox2.Text; 回LS 我是要他的value值 comboBox2.DataSource = ds.Tables[0]; comboBox2.DisplayMember = "sDepartmentName"; comboBox2.ValueMember = "sDID"; string num = "sDID=" + (comboBox2.SelectedValue as System.Data.DataRowView)[字段编号].ToString(); comboBox1.SelectedIndex;comboBox1.SelectedValue;comboBox1.SelectedText;comboBox1.SelectedItem;comboBox1.Text;这几个你好好试试。每个都有不同的用途。http://msdn.microsoft.com/zh-cn/library/system.windows.controls.combobox.aspx 不能用comboBox2.SelectedValue;我也错过应该用comboBox2.Text 这个真的可以,那为什么我之前 label20.Text = comboBox2.SelectedValue.ToString();可以直接取下来? 应该和这个无关。你是不是有的添加的是 string,有的添加的是 System.Data.DataRowView 这样是不支持的,除非自己写个类,设置下显示值和实际值或者直接取显示值/// <summary>/// 自定义类 用于支持ComboBox绑定数据源(value/text)/// </summary>public class ComboBoxItem{ private string _text = null; private object _value = null; /// <summary> /// 显示值 /// </summary> public string Text { get { return this._text; } set { this._text = value; } } /// <summary> /// 实际值 /// </summary> public object Value { get { return this._value; } set { this._value = value; } } public override string ToString() { return this._text; }}ComboBoxItem deptnum = (ComboBoxItem)cbeDepartment.SelectedItem; 回LS的 我绑定的时候是这样绑定的 comboBox2.DataSource = ds.Tables[0];comboBox2.DisplayMember = "sDepartmentName";comboBox2.ValueMember = "sDID";ds 里面每个Sdid对应一个 sDepartmentName 我不可以这样拿他的选择的那个sDepartmentName 的sDID吗?comboBox2.SelectedValue.ToString (); private void LoadMC() { cb_HType.DataSource = bc.GetDT("BT", ""); cb_HType.DisplayMember = "Name"; cb_HType.ValueMember = "ID"; } private void cb_HType_SelectedIndexChanged(object sender, EventArgs e) { cb_QueryName.DataSource = bc.GetDT("BS", cb_HType.SelectedValue.ToString()); cb_QueryName.DisplayMember = "MISSIONNAME"; cb_QueryName.ValueMember = "JOBID"; } private void cb_QueryName_SelectedIndexChanged(object sender, EventArgs e) { DataTable dtmc = bc.GetDT("id", cb_QueryName.SelectedValue.ToString()); cb_Qtype.SelectedValue = dtmc.Rows[0]["BussID"].ToString(); txtJobID.Value = dtmc.Rows[0]["JobID"].ToString(); txtTname.Value = dtmc.Rows[0]["JobTableName"].ToString(); }我程序的一段代码,用:SelectedValue.ToString()是每问题的,但是有个前天combobox必须有选择项,不然异常 打错....用:SelectedValue.ToString()是沒问题的,但是有个前题combobox必须有选择项,不然异常 回楼上:private string _text = null;是什么意思 private string _text = null;是什么意思? DataTable dtmc = bc.GetDT("id", cb_QueryName.SelectedValue.ToString()); 这个句应该会报错啊,第一个combobox还没选择 private void LoadMC()//这个是绑定时间 { cb_HType.DataSource = bc.GetDT("BT", ""); cb_HType.DisplayMember = "Name"; cb_HType.ValueMember = "ID"; } //SelectedIndexChanged注意这个事件 是选择一项后激活的 private void cb_HType_SelectedIndexChanged(object sender, EventArgs e) { cb_QueryName.DataSource = bc.GetDT("BS", cb_HType.SelectedValue.ToString()); cb_QueryName.DisplayMember = "MISSIONNAME"; cb_QueryName.ValueMember = "JOBID"; } private void cb_QueryName_SelectedIndexChanged(object sender, EventArgs e) { DataTable dtmc = bc.GetDT("id", cb_QueryName.SelectedValue.ToString()); cb_Qtype.SelectedValue = dtmc.Rows[0]["BussID"].ToString(); txtJobID.Value = dtmc.Rows[0]["JobID"].ToString(); txtTname.Value = dtmc.Rows[0]["JobTableName"].ToString(); } WPF或者winform自动填写网页表单怎么搞(WPF写的最好。) C#画字符串的方法 WPF Treeview 一个有父子级关系表如何绑定 怎么把这段javascript函数转换成C#的函数 DataGrid或则是repeat怎么实现多列 C#如何从NetWorkStream中读出中文的问题?100!!!! 求教Oracle问题? C#中 BackGroundWorker C# windows 服务操作txt问题。 如何在我的网页里实现象netmeeting里的白板功能 请问,怎么没有ToolBar控件呢 求助:怎么把下面的众多if条件简化一下
comboBox2.DataSource = ds.Tables[0];
comboBox2.DisplayMember = "sDepartmentName";
comboBox2.ValueMember = "sDID";
comboBox1.SelectedValue;
comboBox1.SelectedText;
comboBox1.SelectedItem;
comboBox1.Text;这几个你好好试试。每个都有不同的用途。http://msdn.microsoft.com/zh-cn/library/system.windows.controls.combobox.aspx
应该用comboBox2.Text
label20.Text = comboBox2.SelectedValue.ToString();
可以直接取下来?
或者直接取显示值/// <summary>
/// 自定义类 用于支持ComboBox绑定数据源(value/text)
/// </summary>
public class ComboBoxItem
{
private string _text = null;
private object _value = null;
/// <summary>
/// 显示值
/// </summary>
public string Text { get { return this._text; } set { this._text = value; } }
/// <summary>
/// 实际值
/// </summary>
public object Value { get { return this._value; } set { this._value = value; } }
public override string ToString()
{
return this._text;
}
}ComboBoxItem deptnum = (ComboBoxItem)cbeDepartment.SelectedItem;
comboBox2.DisplayMember = "sDepartmentName";
comboBox2.ValueMember = "sDID";ds 里面每个Sdid对应一个 sDepartmentName
我不可以这样拿他的选择的那个sDepartmentName 的sDID吗?comboBox2.SelectedValue.ToString ();
private void LoadMC()
{
cb_HType.DataSource = bc.GetDT("BT", "");
cb_HType.DisplayMember = "Name";
cb_HType.ValueMember = "ID";
} private void cb_HType_SelectedIndexChanged(object sender, EventArgs e)
{
cb_QueryName.DataSource = bc.GetDT("BS", cb_HType.SelectedValue.ToString());
cb_QueryName.DisplayMember = "MISSIONNAME";
cb_QueryName.ValueMember = "JOBID";
} private void cb_QueryName_SelectedIndexChanged(object sender, EventArgs e)
{
DataTable dtmc = bc.GetDT("id", cb_QueryName.SelectedValue.ToString());
cb_Qtype.SelectedValue = dtmc.Rows[0]["BussID"].ToString();
txtJobID.Value = dtmc.Rows[0]["JobID"].ToString();
txtTname.Value = dtmc.Rows[0]["JobTableName"].ToString();
}我程序的一段代码,用:SelectedValue.ToString()是每问题的,但是有个前天combobox必须有选择项,不然异常
用:SelectedValue.ToString()是沒问题的,但是有个前题combobox必须有选择项,不然异常
private string _text = null;
是什么意思
是什么意思?
{
cb_HType.DataSource = bc.GetDT("BT", "");
cb_HType.DisplayMember = "Name";
cb_HType.ValueMember = "ID";
}
//SelectedIndexChanged注意这个事件 是选择一项后激活的
private void cb_HType_SelectedIndexChanged(object sender, EventArgs e)
{
cb_QueryName.DataSource = bc.GetDT("BS", cb_HType.SelectedValue.ToString());
cb_QueryName.DisplayMember = "MISSIONNAME";
cb_QueryName.ValueMember = "JOBID";
} private void cb_QueryName_SelectedIndexChanged(object sender, EventArgs e)
{
DataTable dtmc = bc.GetDT("id", cb_QueryName.SelectedValue.ToString());
cb_Qtype.SelectedValue = dtmc.Rows[0]["BussID"].ToString();
txtJobID.Value = dtmc.Rows[0]["JobID"].ToString();
txtTname.Value = dtmc.Rows[0]["JobTableName"].ToString();
}