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我正在制定學生考勤系統。我正在創建動態控制並從數據庫分配值。現在我想知道如何找到想要的動態控制,以及如何從中獲得價值。如何找到具體的動態控制並獲得價值
我不知道如何使用foreach
循環找到想要的控制。
這是我創建動態控件的代碼。
public void genControl(StudentAttendence sta)
{
StudentAttendenceBSLDAL stabd = new StudentAttendenceBSLDAL();
List<string[]> liName = stabd.takStudent(sta);
counts = Convert.ToInt16(stabd.takStudent(sta).Count);
for (int i=0; i< stabd.takStudent(sta).Count;i++)
{
for(int j = 0; j<liName[i].Count();j++)
{
Label lblStudentname = new Label();
Label lblStId = new Label();
lblStId.Name = "lblStId"+i.ToString()+j.ToString();
lblStudentname.Name = "liName"+i.ToString()+j.ToString();
lblStId.AutoSize = true;
lblStudentname.AutoSize = true;
if (j==0)
{
lblStId.Text = liName[i][j].ToString();
}
if(j==1)
{
lblStudentname.Text = liName[i][j].ToString();
}
lblStId.AutoSize = true;
lblStudentname.AutoSize = true;
if (i == 1)
{
lblStId.Location = new Point(41, 229);
lblStudentname.Location = new Point(153, 7);
}
else
{
lblStId.Location = new Point(3, 7 + 20);
lblStudentname.Location = new Point(153, 7 + 20);
}
this.Controls.Add(lblStId);
panel1.Controls.Add(lblStudentname);
}
CheckBox cba = new CheckBox();
cba.Name = "cba" + i.ToString() ;
cba.Text = "A";
cba.AutoSize = true;
CheckBox cbp = new CheckBox();
cbp.Name = i.ToString() ;
cbp.Text = "P";
cbp.AutoSize = true;
CheckBox cbl = new CheckBox();
cbl.Name = "cbl" + i.ToString() ;
cbl.Text = "L";
cbl.AutoSize = true;
if (i == 1)
{
cbp.Location = new Point(590, 3);
cba.Location = new Point(631, 3);
cbl.Location = new Point(670, 3);
}
else
{
cbp.Location = new Point(590, 3 + 23);
cba.Location = new Point(631, 3 + 23);
cbl.Location = new Point(670, 3 + 23);
}
panel1.Controls.Add(cbp);
panel1.Controls.Add(cba);
panel1.Controls.Add(cbl);
}
}
這是按鈕控制事件,我試圖找到控件並獲取它的值。
private void button2_Click(object sender, EventArgs e)
{
StudentAttendence sta = new StudentAttendence();
StudentAttendenceBSLDAL stabd = new StudentAttendenceBSLDAL();
// List<string[]> liName = stabd.takStudent(sta);
for (int i=0;i<counts;i++)
{
CheckBox cbP = panel1.Controls.OfType<CheckBox>().FirstOrDefault(b => b.Name.Equals("cbp"+i.ToString()));
// Label stid = panel1.Controls.Find("lblStId" + i.ToString(), false).First() as Label;
if(!cbP.IsChecked)
{
MessageBox.Show("control found");
}
}
}
我建議您將動態創建的控件保存在自己的數據結構中,因此如果需要可以使用它來處理它們 –
Florian Koch我無法理解此「保存在自己的數據結構中動態創建控件「。 –
你只是忘了設置名稱:'cbp.Name = i.ToString();'應該是'cbp.Name =「cbp」+ i.ToString();' –