C# 删除动态创建的文本框
大家好 我正在创建一个函数,根据下拉列表中的选定值动态生成文本框 这是密码C# 删除动态创建的文本框,c#,.net,winforms,C#,.net,Winforms,大家好 我正在创建一个函数,根据下拉列表中的选定值动态生成文本框 这是密码 comboboxNameHolder = ((ComboBox)sender).Name; string comboboxNoHolder =comboboxNameHolder.Replace("cbFunctionList", ""); comboboxNo = Int32.Parse(comboboxNoHolder); funcSelected = ((ComboBox)sender).SelectedItem.
comboboxNameHolder = ((ComboBox)sender).Name;
string comboboxNoHolder =comboboxNameHolder.Replace("cbFunctionList", "");
comboboxNo = Int32.Parse(comboboxNoHolder);
funcSelected = ((ComboBox)sender).SelectedItem.ToString();
for (int i = 0; i < optionList1.GetLength(0); i++)
{
if (funcSelected == optionList1[i, 0])
{
funcNoOfFields = optionList1[i, 1];
}
}
if (lineFieldController[comboboxNo, 1] == 0)
{
fieldCounter = Int32.Parse(funcNoOfFields);
lineFieldController[comboboxNo, 1] = fieldCounter;
inputField1 = new TextBox[fieldCounter];
for (int i = 0; i < fieldCounter; i++)
{
btnAddField0.Visible = false;
inputField = new TextBox();
inputField.Font = new Font("Microsoft Sans Serif", 11.25f);
inputField.Size = new Size(75, 24);
inputField.Location = new Point(positionController[comboboxNo, 0], positionController[comboboxNo, 1]);
inputField.Name = "txtLine" + comboboxNo.ToString() + "Variable" + i.ToString();
this.Controls.Add(inputField1[i]);
positionController[comboboxNo, 0] += 81;
}
}
希望得到您的友好响应您可以将您创建的所有控件放到列表中,并保留对运行时创建的控件的引用 像 但它不起作用。。。抛出异常?返回空值?有什么问题吗?我看不到任何删除/处置控件的代码行。您对控件名称的期望是否正确?是否检查了控件集合中控件的名称?你调试代码了吗?
else
{
for(int i = 0; i < lineFieldController[comboboxNo, 1]; i++)
{
string name = "txtLine" + comboboxNo.ToString() + "Variable" + i.ToString();
TextBox tb = this.Controls.Find(name, true);
}
}
public class Form1
{
List<Control> createdList = new List<Control>(); // class field
void combobox_SelectedIndexChanged()
{
// removing controls were created before
foreach (var created in createdList)
{
this.Controls.Remove(created);
created.Dispose();
}
createdList.Clear(); // all created controls from previous index changed should be removed here
// add each control you are creating to the createList additionally
inputField1 = new TextBox[fieldCounter];
for (int i = 0; i < fieldCounter; i++)
{
btnAddField0.Visible = false;
inputField = new TextBox();
createdList.Add(inputField); //store reference
/// skipping init code
this.Controls.Add(inputField1[i]);
positionController[comboboxNo, 0] += 81;
}
}
}
foreach (Control created in panelCreated.Controls)
created.Dispose();
panelCreated.Controls.Clear();