ASP.NET 控件查找与数据绑定-优快云博客

本文介绍了一个用于 ASP.NET 的实用工具类，其中包括了查找页面控件的方法、控件的数据绑定操作以及一些辅助功能，例如过滤敏感词汇和转换数字为人民币大写金额。

代码

public static Control FindControl(Control container, string id)
{
Control c = container.Page.FindControl(id);
if (c == null)
{
if (!(container is INamingContainer) && (container.NamingContainer != null))
{
container = container.NamingContainer;
}
c = FindControlInternal(container, id, null);
if (c == null)
{
Dictionary<Control, bool> dictionary = new Dictionary<Control, bool>();
dictionary[container] = true;
container = container.NamingContainer;
while (container != null && c == null)
{
c = FindControlInternal(container, id, dictionary);
dictionary[container] = true;
container = container.NamingContainer;
}
}
return c;
}
return c;
}
private static Control FindControlInternal(Control control, string id, Dictionary<Control, bool> dictionary)
{
if (control.ID == id)
{
return control;
}
Control c = control.FindControl(id);
if (c != null && c.ID == id)
{
return c;
}
foreach (Control temp in control.Controls)
{
if (dictionary == null || !dictionary.ContainsKey(temp))
{
c = FindControlInternal(temp, id, dictionary);
if (c != null)
{
return c;
}
}
}
return null;
}
#endregion

#region WebControls
public static void SetPost(object entity)
{
SetPost(entity, CurrentPage);
}
public static void SetPost(object entity, Control parentControl)
{
Guard<ArgumentNullException>(parentControl == null, "parentControl");
foreach (PropertyInfo property in entity.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty))
{
object value = GetPropertyAccess(property).GetValue(entity);
if (value != null)
{
Control control = FindControl(parentControl, property.Name);
if (control != null)
{
ITextControl textControl = control as ITextControl;
if (textControl != null)
{
textControl.Text = value.ToString();
}
else
{
ICheckBoxControl checkBoxControl = control as ICheckBoxControl;
if (checkBoxControl != null)
{
checkBoxControl.Checked = Convert.ToBoolean(value);
}
else
{
HiddenField hiddenField = control as HiddenField;
if (hiddenField != null)
{
hiddenField.Value = value.ToString();
}
}
}
}
}
}
}

public static void GetPost(object entity)
{
GetPost(entity, CurrentPage);
}
public static void GetPost(object entity, Control parentControl)
{
Guard<ArgumentNullException>(parentControl == null, "parentControl");
foreach (PropertyInfo property in entity.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty))
{
Control control = FindControl(parentControl, property.Name);
if (control != null)
{
WebControl webControl = control as WebControl;
if (webControl != null && !string.IsNullOrEmpty(webControl.Attributes["disabled"]))
{
continue;
}
object value = null;
ITextControl textControl = control as ITextControl;
if (textControl != null)
{
value = textControl.Text;
}
else
{
ICheckBoxControl checkBoxControl = control as ICheckBoxControl;
if (checkBoxControl != null)
{
value = checkBoxControl.Checked;
}
else
{
HiddenField hiddenField = control as HiddenField;
if (hiddenField != null)
{
value = hiddenField.Value;
}
}
}
if (value != null)
{
GetPropertyAccess(property).SetValue(entity, ChangeType(property, value));
}
}
}
}
#endregion

protected void Page_Load(object sender, System.EventArgs e)
    {
        DisplayControl(Page.Controls, 0); //调用递归查找控制,用树形显示
    }

    private void DisplayControl(ControlCollection controls, int depth)
    {
        foreach (Control control in controls)
        {
            Response.Write(new String('-', depth * 4) + "> ");
            Response.Write(control.GetType().ToString() + " - <b>" +
              control.ID + "</b><br />");
            if (control.Controls != null)
            {
                DisplayControl(control.Controls, depth + 1);
            }
        }
    }

        public static string FilterWord(string s)
        {
            string[] BadWords = new string[] { "腚", "妓", "娼", "奸", "尻", "贱", "婊", "屄", "赑", "妣", "肏", "尻", "屌" };
            for (int i = 0; i < BadWords.Length; i++)
            {
                s = s.Replace(BadWords[i], new String('*', BadWords[i].Length));
            }
            return s;
        }

/// <summary> 
        /// 转换人民币金额 
        /// </summary> 
        /// <param name="num">金额</param> 
        /// <returns>返回大写形式</returns> 
        public static string ConvertToRMB(decimal num)
        {
            string str1 = "零壹贰叁肆伍陆柒捌玖";  //0-9所对应的汉字 
            string str2 = "万仟佰拾亿仟佰拾万仟佰拾元角分"; //数字位所对应的汉字 
            string str3 = String.Empty;  //从原num值中取出的值 
            string str4 = String.Empty;  //数字的字符串形式 
            string str5 = String.Empty;  //人民币大写金额形式 
            int i;  //循环变量 
            int j;  //num的值乘以100的字符串长度 
            string ch1 = String.Empty;  //数字的汉语读法 
            string ch2 = String.Empty;  //数字位的汉字读法 
            int nzero = 0;  //用来计算连续的零值是几个 
            int temp;  //从原num值中取出的值 

            num = Math.Round(Math.Abs(num), 2);  //将num取绝对值并四舍五入取2位小数 
            str4 = ((long)(num * 100)).ToString();  //将num乘100并转换成字符串形式 
            j = str4.Length;  //找出最高位 
            if (j > str2.Length)
            {
                throw new OverflowException();
            }
            str2 = str2.Substring(15 - j);  //取出对应位数的str2的值。如：200.55,j为5所以str2=佰拾元角分 

            //循环取出每一位需要转换的值 
            for (i = 0; i < j; i++)
            {
                str3 = str4.Substring(i, 1);  //取出需转换的某一位的值 
                temp = Convert.ToInt32(str3);  //转换为数字 
                if (i != (j - 3) && i != (j - 7) && i != (j - 11) && i != (j - 15))
                {
                    //当所取位数不为元、万、亿、万亿上的数字时 
                    if (str3 == "0")
                    {
                        ch1 = String.Empty;
                        ch2 = String.Empty;
                        nzero = nzero + 1;
                    }
                    else
                    {
                        if (str3 != "0" && nzero != 0)
                        {
                            ch1 = "零" + str1.Substring(temp * 1, 1);
                            ch2 = str2.Substring(i, 1);
                            nzero = 0;
                        }
                        else
                        {
                            ch1 = str1.Substring(temp * 1, 1);
                            ch2 = str2.Substring(i, 1);
                            nzero = 0;
                        }
                    }
                }
                else
                {
                    //该位是万亿，亿，万，元位等关键位 
                    if (str3 != "0" && nzero != 0)
                    {
                        ch1 = "零" + str1.Substring(temp * 1, 1);
                        ch2 = str2.Substring(i, 1);
                        nzero = 0;
                    }
                    else
                    {
                        if (str3 != "0" && nzero == 0)
                        {
                            ch1 = str1.Substring(temp * 1, 1);
                            ch2 = str2.Substring(i, 1);
                            nzero = 0;
                        }
                        else
                        {
                            if (str3 == "0" && nzero >= 3)
                            {
                                ch1 = String.Empty;
                                ch2 = String.Empty;
                                nzero = nzero + 1;
                            }
                            else
                            {
                                if (j >= 11)
                                {
                                    ch1 = String.Empty;
                                    nzero = nzero + 1;
                                }
                                else
                                {
                                    ch1 = String.Empty;
                                    ch2 = str2.Substring(i, 1);
                                    nzero = nzero + 1;
                                }
                            }
                        }
                    }
                }
                if (i == (j - 11) || i == (j - 3))
                {
                    //如果该位是亿位或元位，则必须写上 
                    ch2 = str2.Substring(i, 1);
                }
                str5 = str5 + ch1 + ch2;

                if (i == j - 1 && str3 == "0")
                {
                    //最后一位（分）为0时，加上“整” 
                    str5 = str5 + '整';
                }
            }
            if (num == 0)
            {
                str5 = "零元整";
            }
            return str5;
        }
        /// <summary> 
        /// 重载，先将字符串转换成数字再调用ConvertToRMB(decimal num) 
        /// </summary> 
        /// <param name="num">用户输入的金额，字符串形式</param> 
        /// <returns></returns> 
        public static string ConvertToRMB(string num)
        {
            try
            {
                return ConvertToRMB(Convert.ToDecimal(num));
            }
            catch
            {
                return "0.00";
            }
        }

转载于:https://www.cnblogs.com/Googler/archive/2010/12/30/1922153.html