Question

我想知道，有没有办法可以将所有复选框，文本框，数字和其他控件重置为默认值，而无需单独为每个控件编写代码？这是我尝试过的代码，但似乎不起作用：

for (int i = 0; i < this.Controls.Count; i++)
{
    this.Controls[i].ResetText();
}

编辑：
我已经通过手动设置控制值来修复它，抱歉所有麻烦＆gt;。＆lt;。

Answer 1

如下所示创建类并像这样调用它

检查：Reset all Controls (Textbox, ComboBox, CheckBox, ListBox) in a Windows Form using C#

private void button1_Click(object sender, EventArgs e)
{
   Utilities.ResetAllControls(this);
}

public class Utilities
    {
        public static void ResetAllControls(Control form)
        {
            foreach (Control control in form.Controls)
            {
                if (control is TextBox)
                {
                    TextBox textBox = (TextBox)control;
                    textBox.Text = null;
                }

                if (control is ComboBox)
                {
                    ComboBox comboBox = (ComboBox)control;
                    if (comboBox.Items.Count > 0)
                        comboBox.SelectedIndex = 0;
                }

                if (control is CheckBox)
                {
                    CheckBox checkBox = (CheckBox)control;
                    checkBox.Checked = false;
                }

                if (control is ListBox)
                {
                    ListBox listBox = (ListBox)control;
                    listBox.ClearSelected();
                }
            }
        }      
    }

Answer 2

您可以再次创建表单并处理旧表单。

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void btnReset_Click(object sender, EventArgs e)
    {
        Form1 NewForm = new Form1();           
        NewForm.Show();
        this.Dispose(false);
    }
}

Answer 3

foreach (Control field in container.Controls)
            {
                if (field is TextBox)
                    ((TextBox)field).Clear();
                else if (field is ComboBox)
                    ((ComboBox)field).SelectedIndex=0;
                else
                    dgView.DataSource = null;
                    ClearAllText(field);
            }

Answer 4

Additional-＆GT;清除儿童控制下面的函数也会清除嵌套（Child）控件，包含在类中。

 public static void ClearControl(Control control)
        {
            if (control is TextBox)
            {
                TextBox txtbox = (TextBox)control;
                txtbox.Text = string.Empty;
            }
            else if (control is CheckBox)
            {
                CheckBox chkbox = (CheckBox)control;
                chkbox.Checked = false;
            }
            else if (control is RadioButton)
            {
                RadioButton rdbtn = (RadioButton)control;
                rdbtn.Checked = false;
            }
            else if (control is DateTimePicker)
            {
                DateTimePicker dtp = (DateTimePicker)control;
                dtp.Value = DateTime.Now;
            }
            else if (control is ComboBox)
            {
                ComboBox cmb = (ComboBox)control;
                if (cmb.DataSource != null)
                {
                    cmb.SelectedItem = string.Empty;
                    cmb.SelectedValue = 0;
                }
            }
            ClearErrors(control);
            // repeat for combobox, listbox, checkbox and any other controls you want to clear
            if (control.HasChildren)
            {
                foreach (Control child in control.Controls)
                {
                    ClearControl(child);
                }
            }


        }

Answer 5

您可以重置某种类型的所有控件。像

这样的东西

foreach(TextBox tb in this.Controls.OfType<TextBox>().ToArray())
{
   tb.Clear();
}

但您无法立即重置所有控件

Answer 6

快速回答，也许它会有所帮助：

private void button1_Click(object sender, EventArgs e)
{            
    Form2 f2 = new Form2();
    f2.ShowDialog();
    while (f2.DialogResult == DialogResult.Retry)
    {
        f2 = new Form2();
        f2.ShowDialog();
    }
}

并在Form2中（'设置'表单）：

private void button1_Click(object sender, EventArgs e)
{
    DialogResult = DialogResult.OK;
    Close();
}

private void button2_Click(object sender, EventArgs e)
{
    DialogResult = DialogResult.Retry;
    Close();
}

Answer 7

我最近不得不为Textboxes和Checkbox使用JavaScript ...

How to reset textbox and checkbox controls in an ASP.net document

这是代码......

<script src="http://code.jquery.com/jquery-1.7.1.js" type="text/javascript"></script>

<script type="text/javascript">
      function ResetForm() {
          //get the all the Input type elements in the document
          var AllInputsElements = document.getElementsByTagName('input');
          var TotalInputs = AllInputsElements.length;

          //we have to find the checkboxes and uncheck them
          //note: <asp:checkbox renders to <input type="checkbox" after compiling, which is why we use 'input' above
          for(var i=0;i< TotalInputs ; i++ )
          {
            if(AllInputsElements[i].type =='checkbox')
            {
                AllInputsElements[i].checked = false;
            }
          }

          //reset all textbox controls
          $('input[type=text], textarea').val('');

          Page_ClientValidateReset();
          return false;
      }

      //This function resets all the validation controls so that they don't "fire" up
      //during a post-back.
      function Page_ClientValidateReset() {
          if (typeof (Page_Validators) != "undefined") {
              for (var i = 0; i < Page_Validators.length; i++) {
                  var validator = Page_Validators[i];
                  validator.isvalid = true;
                  ValidatorUpdateDisplay(validator);
              }
          }
      }
</script>

用按钮或任何其他方法调用它......

<asp:button id="btnRESET" runat="server" onclientclick="return ResetForm();" text="RESET" width="100px"></asp:button>

如果您不在网站上使用ValidationControls，只需删除上面提及的所有代码，然后拨打电话Page_ClientValidateReset();

我相信你可以使用DOM扩展它以进行任何其他控制。由于服务器上没有帖子，因此速度更快，也没有“闪烁”。

Answer 8

    function setToggleInputsinPnl(pnlName) {
    var domCount = pnlName.length;
    for (var i = 0; i < domCount; i++) {
        if (pnlName[i].type == 'text') {
            pnlName[i].value = '';
        } else if (pnlName[i].type == 'select-one') {
               pnlName[i].value = '';
        }
    }
}

Answer 9

如果您有一些面板或组框，则重置字段应该是递归的。

public class Utilities
{
    public static void ResetAllControls(Control form)
    {
        foreach (Control control in form.Controls)
        {
            RecursiveResetForm(control);
        }
    }

    private void RecursiveResetForm(Control control)
    {            
        if (control.HasChildren)
        {
            foreach (Control subControl in control.Controls)
            {
                RecursiveResetForm(subControl);
            }
        }
        switch (control.GetType().Name)
        {
            case "TextBox":
                TextBox textBox = (TextBox)control;
                textBox.Text = null;
                break;

            case "ComboBox":
                ComboBox comboBox = (ComboBox)control;
                if (comboBox.Items.Count > 0)
                    comboBox.SelectedIndex = 0;
                break;

            case "CheckBox":
                CheckBox checkBox = (CheckBox)control;
                checkBox.Checked = false;
                break;

            case "ListBox":
                ListBox listBox = (ListBox)control;
                listBox.ClearSelected();
                break;

            case "NumericUpDown":
                NumericUpDown numericUpDown = (NumericUpDown)control;
                numericUpDown.Value = 0;
                break;
        }
    }        
}

重置表单中的所有项目

9 个答案: