C# ComboBox DroppedDown屬性存在的問題

功能描述:初始化將數據賦值給ComboBox,通過輸入值再查詢數據庫,功能類似於google搜索功能

直接綁定的話,數據動態變化會報"內存破壞"的信息,所以這裏就沒有綁定了

存在的問題:1.當輸入關鍵字時,輸入的順序是反序的

                2.鼠標指針被窗體掩蓋

                3.輸入關鍵字後,下拉框自動彈出時點內容需點擊兩次

                4.下拉列表出來後,不能使用鍵盤上下鍵進行選擇

代碼:

            private void comboBox1_TextChanged(object sender, EventArgs e) { try { this.comboBox1.TextChanged -= new System.EventHandler(this.comboBox1_TextChanged); comboBox1.Items.Clear(); string text = this.comboBox1.Text; DataSet dataSet = GetUriResultInfo(text); //if (this.comboBox1.Text != "" && this.comboBox1.Text != " ") //{ // comboBox1.DataSource = null; //} //comboBox1.DataSource = dataSet.Tables[0]; //comboBox1.DisplayMember = "Content"; //comboBox1.ValueMember = "SeqNo"; //comboBox1.SelectedIndex = -1; for (int i = 0; i < dataSet.Tables[0].Rows.Count; i++) { this.comboBox1.Items.Add(dataSet.Tables[0].Rows[i]["Content"]); } comboBox1.DroppedDown = true; comboBox1.Text = text; comboBox1.SelectionStart = comboBox1.Text.Length; //顯示鼠標指針 System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.IBeam; //保持鼠標指針形狀 Cursor = System.Windows.Forms.Cursors.Default; //Cursor.Show(); //Cursor.Position = new Point(200, 200); //Cursor.Position = new Point(Cursor.Position.X, Cursor.Position.Y); this.comboBox1.TextChanged += new System.EventHandler(this.comboBox1_TextChanged); } catch (Exception ex) { Console.WriteLine(ex.Message); //AppLogger.LogErrException("frmPrint.cs//frmPrint::LoadUriRpt", ex); } finally { } }

 

            解決了問題一和二,第三個和第四問題待解決