brian0031的专栏

private void Form1_Load(object sender, EventArgs e){    sysdt2.Columns.Add("factory", System.Type.GetType("System.String"));    sysdt2

combox在属性dropdownstyle里设置成DropDownList后,程序执行时即显示第一项private void Form1_Load(object sender, EventArgs e){    comboBox1.Text = comboBox1.Items[0].ToString();}

combox绑定datatable数据源string _str2 = string.Empty;_str1 = string.Format("select distinct p_o, p_id from [QC_Angel] where Product='{0}' ",textBox1.Text.Trim());comboBox1.DataSource = _dt;comboBox

comboBox执行回车键变Tab键private void comboBox2_KeyDown(object sender, KeyEventArgs e){    if (e.KeyCode == Keys.Enter)        textBox1.Focus();}//是KeyDown而不是KeyUp,否则会多跳一个控件private void textBox