[英]Adding a value to a ComboBox in C# WinForm
我正在尝试向组合框添加值。 我可以设置文本,但不能设置值。 我知道我可以用数据表填充组合框,但是我想手动进行以完全控制数据显示。 我可以做ComboBox.Items.Add(),但这只是设置文本。 如何添加值(将是主键,与文本不同)?
public Form1()
{
InitializeComponent();
OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Drew\Documents\Visual Studio 2012\Projects\Football\Football\db\FB_DB.mdb;User Id=admin;Password=;");
//Load QB DropDown
conn.Open();
OleDbCommand cmd = new OleDbCommand("select PlayerID,LastName,FirstName from tb_players where Pos = 'QB' Order By LastName", conn);
OleDbDataReader reader = cmd.ExecuteReader();
string plyrName = "";
while (reader.Read())
{
plyrName = reader["LastName"].ToString() + ", " + reader["FirstName"].ToString();
cbQb.Items.Add(plyrName);
}
conn.Close();
}
尝试这个:
public Form1()
{
InitializeComponent();
OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Drew\Documents\Visual Studio 2012\Projects\Football\Football\db\FB_DB.mdb;User Id=admin;Password=;");
//Load QB DropDown
conn.Open();
OleDbCommand cmd = new OleDbCommand("select PlayerID,LastName,FirstName from tb_players where Pos = 'QB' Order By LastName", conn);
OleDbDataReader reader = cmd.ExecuteReader();
string plyrName = "";
int keyValue;
cbQb.DisplayMember = "Value";
cbQb.ValueMember = "Key";
while (reader.Read())
{
plyrName = reader["LastName"].ToString() + ", " + reader["FirstName"].ToString();
index = Convert.ToInt32(reader["primaryKeyColumnValue"]);
KeyValuePair<int, string> cmbItem = new KeyValuePair<int, string> (index ,plyrName)
cbQb.Items.Add(cmbItem);
}
conn.Close();
}
您可以像这样获得所选项目的键的值:
((KeyValuePair<int, string>)cbQb.SelectedItem).Key
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.