C# winform combobox 在绑定数据之后插入一项选择项

1 private void setDBPyhNameComboBox()

6 {

7

8 this.combPhy.DataSource = null;

9

DBConnectioin dbc = new DBConnectioin();

SqlConnection conn = new SqlConnection(DBConnectioin.conStr);

conn.Open();

//DbHelperSQL.setComboList(combPhy, "select PhyID,PhyName from Physician", "Physician", "PhyName", "PhyID");

string sSQL = "select PhyID,PhyName from Physician";

string sTable = "Physician";

DataSet dsCourtesy = new DataSet();

SqlDataAdapter daCourtesy = new SqlDataAdapter();

DbHelperSQL.setCommand(dsCourtesy, daCourtesy, sSQL, sTable);

daCourtesy.Fill(dsCourtesy);

combPhy.DataSource = dsCourtesy.Tables[0].DefaultView;

DataRow dr = dsCourtesy.Tables[0].NewRow();

combPhy.DisplayMember = "PhyName";

combPhy.ValueMember = "PhyID";

dr["PhyName"] = "全部";

dr["PhyID"] = -1;

dsCourtesy.Tables[0].Rows.InsertAt(dr, 0);

//combPhy.Text = "全部";

}

ProductCatalogListBLL productCatalogListBLL = new ProductCatalogListBLL();
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindClass();
}
}
/// <summary>
///
/// </summary>
void BindClass()
{
List<ProductCatalogListInfo> list = productCatalogListBLL.get_List();
foreach (ProductCatalogListInfo model in list)
{
ListItem li = new ListItem();
li.Text = "╋" + model.ProductCatalogName;
li.Value = model.ProductCatalogId.ToString();
DropDownList1.Items.Add(li);
BindChild(model.ProductCatalogId.ToString(), "├──");
}
}
/// <summary>
///
/// </summary>
/// <param name="ParentID"></param>
/// <param name="separator"></param>
void BindChild(string ParentID, string separator)
{
List<ProductCatalogListInfo> list = productCatalogListBLL.get_List(ParentID);
foreach (ProductCatalogListInfo model in list)
{
ListItem li = new ListItem();
li.Text = separator + model.ProductCatalogName;
li.Value = model.ProductCatalogId.ToString();
DropDownList1.Items.Add(li);
string separator_ = separator + "───";
BindChild(model.ProductCatalogId.ToString(), separator_);
}
}

　　

/// <summary>
///
/// </summary>
/// <returns></returns>
public List<ProductCatalogListInfo> get_List()
{
List<ProductCatalogListInfo> List = new List<ProductCatalogListInfo>();
DataTable dt = DBHelper.getDataSet("select * from ProductCatalogList where ProductCatalogParent=0 order by ProductCatalogId desc").Tables[0];
foreach (DataRow dr in dt.Rows)
{
ProductCatalogListInfo model = new ProductCatalogListInfo();
model.ProductCatalogId = Convert.ToInt32(dr["ProductCatalogId"]);
model.ProductCatalogName = dr["ProductCatalogName"].ToString();
model.ProductCatalogParent = Convert.ToInt32(dr["ProductCatalogParent"]);
List.Add(model);
}
return List;
}
/// <summary>
///
/// </summary>
/// <param name="ParentID"></param>
/// <returns></returns>
public List<ProductCatalogListInfo> get_List(string ParentID)
{
List<ProductCatalogListInfo> List = new List<ProductCatalogListInfo>();
DataTable dt = DBHelper.getDataSet("select * from ProductCatalogList where ProductCatalogParent=" + ParentID + " order by ProductCatalogId desc").Tables[0];
foreach (DataRow dr in dt.Rows)
{
ProductCatalogListInfo model = new ProductCatalogListInfo();
model.ProductCatalogId = Convert.ToInt32(dr["ProductCatalogId"]);
model.ProductCatalogName = dr["ProductCatalogName"].ToString();
model.ProductCatalogParent = Convert.ToInt32(dr["ProductCatalogParent"]);
List.Add(model);
}
return List;
}