1.Form1_Load  中添加

Control.CheckForIllegalCrossThreadCalls = false; //这样算是掩耳盗铃的做法,依然获取不到CommBox 的值

2.委托也是获取不到值

delegate string GetTextCallback(System.Windows.Forms.ComboBox cbos);
private string GetText(System.Windows.Forms.ComboBox cbos)
{
string rtext = "";
if (cbos.InvokeRequired) { //到这就不往下走了
GetTextCallback get = new GetTextCallback(GetText);
cbos.Invoke(get, new object[] { cbos });
} else {
rtext = cbos.Text;
}
return rtext;
}

3.目前的办法是在线程开始前获取ComboBox的值

开发环境 Microsoft Visual Studio 2008

希望高人指点一下迷津,不胜感激!
下面源码:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace WMSAuxiliaryManageTool
{
public partial class Form2 : Form
{
protected CS.BLL.CheckStock ckbll = new CS.BLL.CheckStock();
public Form2()
{
InitializeComponent();
}

private void Form2_Load(object sender, EventArgs e)
{
pic_loading.Visible = false;
pnl_pic.Visible = false;
comboBox1.SelectedText = "星期2";

}

private void button1_Click(object sender, EventArgs e)
{
Thread t = new Thread(SearchMethod);
t.Name = "GetDataSource";
t.Start();
}

private void SearchMethod()
{
UpdatePic(true);
MessageBox.Show(textBox1.Text);//正确
MessageBox.Show(comboBox1.SelectedText);//报错 谁解释一下
//GetText(); 也获取不到值
DataTable dt = new DataTable();
dt = logbll.getall().Tables[0];
UpdateDataGridView(dt);
UpdatePic(false);
}

delegate string GetTextCallback(System.Windows.Forms.ComboBox cbos);
private string GetText(System.Windows.Forms.ComboBox cbos)
{
string rtext = "";
if (cbos.InvokeRequired) {
GetTextCallback get = new GetTextCallback(GetText);
cbos.Invoke(get, new object[] { cbos });
} else {
rtext = cbos.Text;
}
return rtext;
}

delegate void UpdateDataGridViewCallBack(DataTable dt);
private void UpdateDataGridView(DataTable dt)
{
if (this.dataGridView1.InvokeRequired) {
UpdateDataGridViewCallBack dgv = new UpdateDataGridViewCallBack(UpdateDataGridView);
this.Invoke(dgv, new object[] { dt });
} else {
dataGridView1.DataSource = dt;
lbl_DataCount.Text = dt.Rows.Count.ToString();
}
}

delegate void UpdatePicCallBack(bool b);
private void UpdatePic(bool b)
{
if (this.pic_loading.InvokeRequired) {
UpdatePicCallBack pic = new UpdatePicCallBack(UpdatePic);
this.Invoke(pic, new object[] { b });
} else {
Form2 f2 = new Form2();
pnl_pic.Visible = b;
pic_loading.Visible = b;
pnl_pic.BringToFront();
pnl_pic.Top = (f2.Height / 2) - pnl_pic.Height;
pnl_pic.Left = (f2.Width / 2) - (pnl_pic.Width / 2);
}
}


}
}