在WinForm程序中，我們有時需要對某容器內的所有控件做批量操作、如批量判斷是否允許爲空？批量設置爲只讀、批量設置爲可用或不可用等常用操作，本文分享這幾種方法，起拋磚引玉的作用，歡迎討論！
1、 清除容器控件內裏面指定控件的值的方法
/// <summary>
/// 清除容器裏面指定控件的值(通過控件的AccessibleName屬性設置爲"EmptyValue")
/// </summary>
/// <param name="parContainer">容器控件</param>
public static void EmptyControlValue(Control parContainer)
{
for (int index = 0; index < parContainer.Controls.Count; index++)
{
//如果是容器類控件，遞歸調用自己
if (parContainer.Controls[index].HasChildren && !parContainer.Controls[index].GetType().Name.ToLower().StartsWith("uc"))
{
EmptyControlValue(parContainer.Controls[index]);
}
else
{
if (parContainer.Controls[index].AccessibleName == null ||
!parContainer.Controls[index].AccessibleName.ToLower().Contains("emptyvalue"))
{
continue;
}
switch (parContainer.Controls[index].GetType().Name)
{
case "Label":
break;
//case "ComboBox":
// ((ComboBox)(parContainer.Controls[index])).Text = "";
// break;
case "TextBox":
((TextBox)(parContainer.Controls[index])).Text = "";
break;
case "UcTextBox":
((UcTextBox)(parContainer.Controls[index])).Text = "";
break;
case "RichTextBox":
((RichTextBox)(parContainer.Controls[index])).Text = "";
break;
case "MaskedTextBox":
((MaskedTextBox)(parContainer.Controls[index])).Text = "";
break;
case "UcMaskTextBox":
((UcMaskTextBox)(parContainer.Controls[index])).Text = "";
break;
case "RadioButton":
((RadioButton)(parContainer.Controls[index])).Checked = false;
break;
case "CheckBox":
((CheckBox)(parContainer.Controls[index])).Checked = false;
break;
}
}
}
}
要清空控件的值、只需調用：
EmptyControlValue(容器控件名稱);
2、斷一容器控件內某控件的值是否可以爲空？
/// <summary>
/// 判斷一容器控件內某控件的值是否可以爲空(通過控件的AccessibleName屬性設置爲"NotNull")
/// <remarks>
/// 說明：
/// 此方法顯示提示信息，對於相應取值不能爲空的控件，應設置其“Tag”屬性，以友好提示信息。
/// </remarks>
/// </summary>
/// <param name="parContainer">容器控件</param>
public static bool ControlValueIsEmpty(Control parContainer)
{
bool returnValue = true;
string hintInfo = string.Empty;
for (int index = 0; index < parContainer.Controls.Count; index++)
{
//如果是容器類控件，遞歸調用自己
if (parContainer.Controls[index].HasChildren && !parContainer.Controls[index].GetType().Name.ToLower().StartsWith("uc"))
{
ControlValueIsEmpty(parContainer.Controls[index]);
}
else
{
if (string.IsNullOrEmpty(parContainer.Controls[index].AccessibleName))
{
continue;
}
if (!parContainer.Controls[index].AccessibleName.ToLower().Contains("notnull")
&& !parContainer.Controls[index].GetType().Name.ToLower().Contains("mask"))
{
continue;
}
switch (parContainer.Controls[index].GetType().Name)
{
case "Label"://排除Label
break;
case "ComboBox":
case "ComboBoxEx":
case "UcComboBoxEx":
if (parContainer.Controls[index] is ComboBox)
{
if (((ComboBox)(parContainer.Controls[index])).Text.Trim() == string.Empty)
{
hintInfo += GetControlName((ComboBox)parContainer.Controls[index]) + "\n";
//ShowInfo((ComboBox)parContainer.Controls[index], " 不能爲空!");
//((ComboBox)(parContainer.Controls[index])).Focus();
returnValue = false;
}
}
else
{
if (((UcComboBoxEx)(parContainer.Controls[index])).Text.Trim() == string.Empty)
{
hintInfo += GetControlName((UcComboBoxEx)parContainer.Controls[index]) + "\n";
//ShowInfo((UcComboBoxEx)parContainer.Controls[index], " 不能爲空!");
//((UcComboBoxEx)(parContainer.Controls[index])).Focus();
returnValue = false;
}
}
break;
case "TextBox":
case "UcTextBox":
if (parContainer.Controls[index] is TextBox)
{
if (((TextBox)(parContainer.Controls[index])).Text.Trim() == string.Empty)
{
hintInfo += GetControlName((TextBox)parContainer.Controls[index]) + "\n";
//ShowInfo((TextBox)parContainer.Controls[index], " 不能爲空!");
//((TextBox)(parContainer.Controls[index])).Focus();
returnValue = false;
}
}
else
{
if (((UcTextBox)(parContainer.Controls[index])).Text.Trim() == string.Empty)
{
hintInfo += GetControlName((UcTextBox)parContainer.Controls[index]) + "\n";
//ShowInfo((UcTextBox)parContainer.Controls[index], " 不能爲空!");
//((UcTextBox)(parContainer.Controls[index])).Focus();
returnValue = false;
}
}
break;
case "RichTextBox":
if (((RichTextBox)(parContainer.Controls[index])).Text.Trim() == string.Empty)
{
hintInfo += GetControlName((RichTextBox)parContainer.Controls[index]) + "\n";
//ShowInfo((RichTextBox)parContainer.Controls[index], " 不能爲空!");
//((RichTextBox)(parContainer.Controls[index])).Focus();
returnValue = false;
}
break;
case "MaskedTextBox":
case "UcMaskTextBox":
string mskTxtValue = string.Empty;
object controlChinaeseName = null;
if (parContainer.Controls[index] is MaskedTextBox)
{
mskTxtValue = ((MaskedTextBox)(parContainer.Controls[index])).Text;
controlChinaeseName = ((MaskedTextBox)(parContainer.Controls[index])).Tag ?? ((MaskedTextBox)(parContainer.Controls[index])).Name;
}
else
{
mskTxtValue = ((UcMaskTextBox)(parContainer.Controls[index])).Text;
controlChinaeseName = ((UcMaskTextBox)(parContainer.Controls[index])).Tag ?? ((UcMaskTextBox)(parContainer.Controls[index])).Name;
}
if (mskTxtValue.Substring(0, 4).Trim().Length > 0) //如果有有值，則要對輸入的日期進行格式判斷
{
if (DateTimeHelper.IsDate(mskTxtValue))
{
//把用戶輸入的日期數據控制在(1754-01-01 至 9999-12-31這間)，這主要解決SqlServer與C#日期範圍的衝突
if (DateTimeHelper.ToDate(mskTxtValue) < DateTimeHelper.ToDate("1754-01-01") ||
DateTimeHelper.ToDate(mskTxtValue) >= DateTimeHelper.ToDate("9999-12-31"))
{
MessageBoxHelper.ShowErrorMsg("[" + controlChinaeseName + "] 日期範圍不正確! /n正確日期範圍爲:1754-01-01 至 9999-12-31");
returnValue = false;
}
}
else
{
MessageBoxHelper.ShowErrorMsg("[" + controlChinaeseName + "] 日期格式不正確! 正確格式如:2012-01-01");
returnValue = false;
}
}
else
{
if (mskTxtValue.Substring(0, 5).Equals(" -") && parContainer.Controls[index].AccessibleName.ToLower() == "notnull")
{
MessageBoxHelper.ShowErrorMsg("[" + controlChinaeseName + "]不能爲空!");
returnValue = false;
}
}
break;
default:
break;
}
}
}
if (!string.IsNullOrEmpty(hintInfo.Trim()))
{
MessageBoxHelper.ShowWarningMsg(hintInfo + "不能爲空！");
}
return returnValue;
}
private static string GetControlName(Control ctr)
{
if (ctr.Tag == null)
{
return ctr.Name;
}
else
{
return ctr.Tag.ToString();
}
}
private static void ShowInfo(Control ctr, string info)
{
if (ctr.Tag == null)
{
MessageBoxHelper.ShowWarningMsg(ctr.Name + info);
}
else
{
MessageBoxHelper.ShowWarningMsg(ctr.Tag + info);
}
}
方法“ControlValueIsEmpty”可以用於批量判斷指定容器內的所有控件是否可以爲空，對於不爲空的可以做批量提示顯示，設置如下圖所示：
3、設置容器控件中包含的控件爲只讀？
/// <summary>
/// 設置容器控件中包含的控件爲只讀(通過控件的AccessibleName屬性設置爲"CanReadOnly")
/// </summary>
/// <param name="parContainer">容器控件</param>
/// <param name="isReadOnly">是否爲只讀，true是隻讀,false則相反</param>>
public static void SetControlReadOnly(Control parContainer, bool isReadOnly)
{
for (int index = 0; index < parContainer.Controls.Count; index++)
{
//如果是容器類控件，遞歸調用自己
if (parContainer.Controls[index].HasChildren)
{
SetControlReadOnly(parContainer.Controls[index], isReadOnly);
}
else
{
if (parContainer.Controls[index].AccessibleName == null &&
!parContainer.Controls[index].AccessibleName.ToLower().Contains("canreadonly"))
{
continue;
}
switch (parContainer.Controls[index].GetType().Name)
{
case "TextBox":
case "UcTextBox":
if (parContainer.Controls[index] is TextBox)
{
((TextBox)(parContainer.Controls[index])).ReadOnly = isReadOnly;
}
else
{
((UcTextBox)(parContainer.Controls[index])).ReadOnly = isReadOnly;
}
break;
case "RichTextBox":
((RichTextBox)(parContainer.Controls[index])).ReadOnly = isReadOnly;
break;
case "MaskedTextBox":
case "UcMaskTextBox":
if (parContainer.Controls[index] is MaskedTextBox)
{
((MaskedTextBox)(parContainer.Controls[index])).ReadOnly = isReadOnly;
}
else
{
((UcMaskTextBox)(parContainer.Controls[index])).ReadOnly = isReadOnly;
}
break;
case "ComboBox":
((ComboBox)(parContainer.Controls[index])).Enabled = !isReadOnly;
break;
case "Button":
case "UcButton":
if (parContainer.Controls[index] is Button)
{
((Button)(parContainer.Controls[index])).Enabled = !isReadOnly;
}
else
{
((UcButton)(parContainer.Controls[index])).Enabled = !isReadOnly;
}
break;
default:
break;
}
}
}
}
方法“SetControlReadOnly”的使用方式與上面的方法相同，只要設置控件的“AccessibleName”屬性爲“CanReadOnly”即可。
4、設置容器控件中包含的控件是否可用？
/// <summary>
/// 設置容器控件中包含的控件是否可用(通過控件的AccessibleName屬性設置爲"Enabled")
/// </summary>
/// <param name="parContainer">容器控件</param>
/// <param name="isEnabled">是否爲用可，true:可用,false:不可用</param>>
public static void SetControlEnabled(Control parContainer, bool isEnabled)
{
for (int index = 0; index < parContainer.Controls.Count; index++)
{
//如果是容器類控件，遞歸調用自己
if (parContainer.Controls[index].HasChildren)
{
SetControlEnabled(parContainer.Controls[index], isEnabled);
}
else
{
if (parContainer.Controls[index].AccessibleName == null &&
!parContainer.Controls[index].AccessibleName.ToLower().Contains("Enabled"))
{
continue;
}
//(parContainer.Controls[index]).BackColor = System.Drawing.Color.White;//設置當前控件的背景色爲白色
switch (parContainer.Controls[index].GetType().Name)
{
case "Label":
break;
default:
parContainer.Controls[index].Enabled = isEnabled;
break;
}
}
}
}
方法“SetControlEnabled”用於設置容器控件內的指定控件的Enabled屬性。
同時需要說明的時，這些方法可以同時設置，只需要設置控件的“AccessibleName”爲這種類型即可：EmptyValue| NotNull |Enabled|CanReadOnly，這樣設置即可，對於提示信息的顯示，我們可以設置控件的Tag屬性。
