Combobox表现异常 [英] Combobox is Behaving Abnormally
本文介绍了Combobox表现异常的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的winForm应用程序中有多个组合框。我正在从我的数据库填充这些组合框，我也启用了自动完成模式。问题是，当我搜索任何项目然后选择搜索的项目时，组合框不会选择
我的选择它从列表中选择任何随机索引。
任何帮助都会受到高度赞赏，因为我在这个问题上遇到了这么多天。
I have multiple combobox in my winForm application. I am populating those comboboxes from my database and I have enabled the autocompletemode also. The problem is that when I search any item and then selects the searched item, the combobox doesn't selects
my selection it selects any random index from the list.
Any help would be highly appreciated because I am stuck in this problem for so many days.
private void Expected_Load(object sender, EventArgs e)
{
//this.Activated += new EventHandler(ReloadExpectedForm);
LoadExpected();
box_imp_exp.SelectedIndex = 0;
}
public void LoadExpected()
{
imp_exp.SelectedIndex = 0;
this.AcceptButton = btnExpectedSave;
this.CancelButton = btnExpectedCancel;
id_expected.KeyDown += new KeyEventHandler(id_expected_KEYDOWN);
arrivalDate_expected.CustomFormat = "MM/dd/yy";
arrivalDate_expected.Format = DateTimePickerFormat.Custom;
//arrivalDate_expected.ShowUpDown = true;
departureDate_expected.CustomFormat = "MM/dd/yy";
departureDate_expected.Format = DateTimePickerFormat.Custom;
//departureDate_expected.ShowUpDown = true;
estimatedTime_expected.CustomFormat = "hh:mm tt";
estimatedTime_expected.Format = DateTimePickerFormat.Custom;
estimatedTime_expected.ShowUpDown = true;
GetFormData();
}
public void GetFormData()
{
List<string> crafts = new List<string>();
OracleConnection conn = new OracleConnection(Data.connString_ORA);
OracleCommand comm = new OracleCommand();
comm.Connection = conn;
try
{
if (conn.State == ConnectionState.Closed)
{
conn.Open();
}
comm.CommandText = "SELECT ct_sht_desc from cargo_type";
OracleDataReader reader = comm.ExecuteReader();
if (reader.HasRows)
{
int i = 1;
crafts.Insert(0, "Select Commodity");
while (reader.Read())
{
crafts.Insert(i, reader["ct_sht_desc"].ToString());
i++;
}
}
else
{
crafts.Insert(0, "No Commodity Found");
}
commodity_expected.DataSource = crafts;
commodity_expected.SelectedIndex = 0;
commodity_expected.BindingContext = new System.Windows.Forms.BindingContext();
crafts.Clear();
reader.Close();
comm.CommandText = "SELECT unit_sht_desc FROM units";
reader = comm.ExecuteReader();
if (reader.HasRows)
{
int i = 1;
crafts.Insert(0, "Select Unit");
while (reader.Read())
{
crafts.Insert(i, reader["unit_sht_desc"].ToString());
i++;
}
}
else
{
crafts.Insert(0, "No Unit Found");
}
cargo_unit.DataSource = crafts;
cargo_unit.SelectedIndex = 0;
cargo_unit.BindingContext = new System.Windows.Forms.BindingContext();
crafts.Clear();
reader.Close();
comm.CommandText = "SELECT p_desc FROM port";
reader = comm.ExecuteReader();
if (reader.HasRows)
{
int i = 1;
crafts.Insert(0, "Select Port");
while (reader.Read())
{
if (reader["p_desc"].ToString() != "No Port")
{
crafts.Insert(i, reader["p_desc"].ToString());
i++;
}
}
}
else
{
crafts.Insert(0, "No Port Found");
}
lastport_expected.DataSource = crafts;
lastport_expected.SelectedIndex = 0;
lastport_expected.BindingContext = new System.Windows.Forms.BindingContext();
crafts.Clear();
reader.Close();
SqlConnection sqlconn = new SqlConnection(Data.connString);
SqlCommand sqlcomm = new SqlCommand();
id = 0;
if (sqlconn.State==ConnectionState.Closed)
{
sqlconn.Open();
}
sqlcomm.Connection = sqlconn;
sqlcomm.CommandText = @"SELECT MAX(id) FROM shipping ;";
SqlDataReader sqlreader = sqlcomm.ExecuteReader();
if (sqlreader.HasRows)
{
sqlreader.Read();
id = Convert.ToInt32(sqlreader[0].ToString());
id++;
}
else
{
id = 0;
}
id_expected.Text = id.ToString();
sqlreader.Close();
}
catch (Exception ex)
{
conn.Close();
MessageBox.Show("Somme Error Occured while fetching information\nError\n" + ex);
}
try
{
if (conn.State == ConnectionState.Closed)
{
conn.Open();
}
comm.CommandText = "SELECT s_name from ship";
OracleDataReader reader = comm.ExecuteReader();
if (reader.HasRows)
{
int i = 1;
crafts.Insert(0, "Select Ship");
while (reader.Read())
{
crafts.Insert(i, reader["s_name"].ToString());
i++;
}
}
else
{
crafts.Insert(0, "No Ship Found");
}
shipname_expected.DataSource = crafts;
shipname_expected.BindingContext = new System.Windows.Forms.BindingContext();
crafts.Clear();
reader.Close();
comm.CommandText = "SELECT ag_desc from shipping_agency";
reader = comm.ExecuteReader();
if (reader.HasRows)
{
int i = 1;
crafts.Insert(0, "Select Agent");
while (reader.Read())
{
crafts.Insert(i, reader["ag_desc"].ToString());
i++;
}
}
else
{
crafts.Insert(0, "No Agent Found");
}
agentname_expected.DataSource = crafts;
agentname_expected.SelectedIndex = 0;
agentname_expected.BindingContext = new System.Windows.Forms.BindingContext();
conn.Close();
}
catch (Exception ex)
{
conn.Close();
MessageBox.Show("Somme Error Occured\nError\n" + ex);
}
}
$
推荐答案
我的winForm应用程序中有多个组合框。我正在从我的数据库填充这些组合框，我也启用了自动完成模式。问题是，当我搜索任何项目然后选择搜索的项目时，组合框不会
选择我的选择它从列表中选择任何随机索引。
任何帮助都会受到高度赞赏，因为我在这个问题上遇到了这么多天。
I have multiple combobox in my winForm application. I am populating those comboboxes from my database and I have enabled the autocompletemode also. The problem is that when I search any item and then selects the searched item, the combobox doesn't selects my selection it selects any random index from the list.
Any help would be highly appreciated because I am stuck in this problem for so many days.
我的Stackoverflow Post的代码更多地解释了这个问题，请看看
The question is more explained with code at my Stackoverflow Post kindly take a look
http://stackoverflow.com/questions/40758011/combobox-behaving-abnormally
http://stackoverflow.com/questions/40758011/combobox-behaving-abnormally
这篇关于Combobox表现异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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