前记:数据源来自页面的一个ComboBox的数据源List<Contract>集合
页面放置一个TextBox(搜索框)、ListBox(显示搜索出来的数据),ListBox位置位于TextBox正下方,初始化隐藏。
TextBox--->txtSearch ListBox--->listBox1关于两个控件的事件,详见代码:
[c-sharp] view plain copy
- #region 自能提示
- Point pList = new Point();
- private void txtSearch_TextChanged(object sender, EventArgs e)
- {
- if (this.txtSearch.Text.Trim() != "")
- {
- List<Contract> source = getDataTable(this.txtSearch.Text.Trim());
- BindList(source);
- this.listBox1.Visible = true;
- }
- else
- {
- this.listBox1.Items.Clear();
- this.listBox1.Visible = false;
- }
- }
- private void txtSearch_KeyDown(object sender, KeyEventArgs e)
- {
- if (e.KeyCode == Keys.Down && this.listBox1.Visible)
- {
- this.listBox1.Focus();
- if (this.listBox1.SelectedItems.Count > 0)
- {
- this.listBox1.SetSelected(this.listBox1.SelectedIndex, false);
- }
- if (this.listBox1.Items.Count > 0)
- {
- this.listBox1.SetSelected(0, true);
- }
- }
- }
- private void listBox1_MouseUp(object sender, MouseEventArgs e)
- {
- if (this.listBox1.SelectedItems.Count > 0)
- {
- this.txtSearch.Text = this.listBox1.Text;
- cboChoCont.Text = this.txtSearch.Text;
- this.listBox1.Visible = false;
- this.txtSearch.Focus();
- }
- }
- private void listBox1_MouseMove(object sender, MouseEventArgs e)
- {
- Point m = new Point(e.X, e.Y);
- int index = GetItemAt(this.listBox1, e.X, e.Y);
- if (this.listBox1.SelectedItems.Count > 0 && this.listBox1.SelectedIndex != index)
- {
- this.listBox1.SetSelected(this.listBox1.SelectedIndex, false);
- }
- if (index != -1 && this.listBox1.SelectedIndex != index)
- {
- this.listBox1.SetSelected(index, true);
- }
- }
- private void listBox1_KeyDown(object sender, KeyEventArgs e)
- {
- if (e.KeyCode == Keys.Enter && this.listBox1.Visible && this.listBox1.SelectedItems.Count > 0)
- {
- this.txtSearch.Text = this.listBox1.SelectedItems[0].ToString();
- this.cboChoCont.Text = this.txtSearch.Text;
- this.listBox1.Visible = false;
- this.txtSearch.Focus();
- }
- }
- private bool GetItemAt(Point Mousep, int index)
- {
- int ph = this.listBox1.GetItemHeight(index) * index;
- int ph1 = this.listBox1.GetItemHeight(index) * index + this.listBox1.GetItemHeight(index);
- if (Mousep.Y > ph && Mousep.Y < ph1 && Mousep.X > 0 && Mousep.X < this.listBox1.Width)
- {
- return true;
- }
- else
- {
- return false;
- }
- }
- private int GetItemAt(ListBox listBox, int X, int Y)
- {
- int index = -1;
- for (int i = 0; i < listBox.Items.Count; i++)
- {
- System.Drawing.Rectangle r = listBox.GetItemRectangle(i);
- if (r.Contains(new Point(X, Y)))
- {
- index = i; ;
- break;
- }
- }
- return index;
- }
- private void BindList(List<Contract> source)
- {
- this.listBox1.Items.Clear();
- for (int i = 0; i < source.Count; i++)
- {
- this.listBox1.Items.Add(source[i].Con_Name_Serial);
- }
- if (source.Count < 11)
- {
- this.listBox1.Height = 15 * source.Count + 15;
- }
- else
- {
- this.listBox1.Height = 150;
- }
- this.listBox1.Visible = true;
- }
- private List<Contract> getDataTable(string s)
- {
- List<Contract> searchList = new List<Contract>();
- int length = list.Count;
- for (int i = 0; i < length; i++)
- {
- if (list[i].Con_Name_Serial.IndexOf(s) == 0)
- searchList.Add(list[i]);
- }
- return searchList;
- }
- private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
- {
- // Set the DrawMode property to draw fixed sized items.
- listBox1.DrawMode = DrawMode.OwnerDrawFixed;
- // Draw the background of the ListBox control for each item.
- e.DrawBackground();
- // Define the default color of the brush as black.
- Brush myBrush = Brushes.Black;
- FontFamily fontFamily = new FontFamily("宋体");
- System.Drawing.Font myFont = new Font(fontFamily, 9);
- // Determine the color of the brush to draw each item based on the index of the item to draw.
- if((e.State & DrawItemState.Selected) == DrawItemState.Selected)
- {
- //e.Graphics.FillRectangle(Brushes.Blue, e.Bounds);
- if(e.Index > -1)
- {
- e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), myFont, Brushes.White, e.Bounds, StringFormat.GenericDefault);
- }
- }
- else
- {
- //e.Graphics.FillRectangle(Brushes.White, e.Bounds);
- if(e.Index > -1)
- {
- e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), myFont, myBrush, e.Bounds, StringFormat.GenericDefault);
- }
- }
- // Draw the current item text based on the current Font and the custom brush settings.
- //e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), e.Font, myBrush, e.Bounds, StringFormat.GenericDefault);
- // If the ListBox has focus, draw a focus rectangle around the selected item.
- e.DrawFocusRectangle();
- }
- #endregion
转载来自:http://blog.csdn.net/Rock870210/article/details/5856235
时间: 2024-10-11 04:16:32