一些常用的小东东Csharp版

    一些常用的东东，何必重复造轮子了。放这里更方便查找（方便自己哈）。 

1. DropDownList 通用绑定

  /// <summary>
        /// dropDownList Bind
        /// </summary>
        /// <param name="ddl">dropdownlist id</param>
        /// <param name="strSql">sql text</param>
        /// <param name="textField">text field</param>
        /// <param name="valueField">value field</param>
        public void DropDownListBind(DropDownList ddl, string strSql,string textField,string valueField)
        {
            var dataTable =sqlHepler.ExeDataTable("text", strSql, null, null, "", true);
            ddl.DataSource = dataTable;
            ddl.DataValueField = dataTable.Columns[valueField].ToString();
            ddl.DataTextField = dataTable.Columns[textField].ToString();
            ddl.DataBind();
 
            ddl.Items.Insert(0, new ListItem(" - Select - ", ""));
        }

2. 清空TEXTBOX 值
  1> WEBFORM:     

/// <summary>
        /// Clear Control text
        /// </summary>
        /// <param name="ct"></param>
        protected void ClearControl(ControlCollection ct)
        {
            foreach (Control ctl in ct)
            {
                if (ctl is TextBox)
                {
                    TextBox t = (TextBox)ctl;
                    t.Text = string.Empty;
                }
                if (ctl.HasControls())
                {
                    ClearControl(ctl.Controls);
                }
            }
        }

  2> WINFORM:

foreach (System.Windows.Forms.Control control in this.Controls)
      {
            if (control is System.Windows.Forms.TextBox)
             {
                System.Windows.Forms.TextBox tb = (System.Windows.Forms.TextBox)control ; 
                 tb.Text = String.Empty ;
            }
      }