动态组合SQL语句方式实现批量更新

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
//引入如下命名空间
using System.Text.RegularExpressions;
using System.Text;

/// <summary>
///StrHelper 的摘要说明
/// </summary>
public class StrHelper
{
public StrHelper(){}
/// <summary>
/// 截取字符串函数
/// </summary>
/// <param name="str">所要截取的字符串</param>
/// <param name="num">截取字符串的长度</param>
/// <returns></returns>
static public string GetSubString(string str, int num)
{
#region
return (str.Length > num) ? str.Substring(0, num) + "..." : str;
#endregion
}
/// <summary>
/// 截取字符串优化版
/// </summary>
/// <param name="stringToSub">所要截取的字符串</param>
/// <param name="length">截取字符串的长度</param>
/// <returns></returns>
public static string GetFirstString(string stringToSub, int length)
{
#region
Regex regex = new Regex("[\u4e00-\u9fa5]+", RegexOptions.Compiled);
char[] stringChar = stringToSub.ToCharArray();
StringBuilder sb = new StringBuilder();
int nLength = 0;
bool isCut = false;
for (int i = 0; i < stringChar.Length; i++)
{
if (regex.IsMatch((stringChar[i]).ToString()))//regex.IsMatch指示正则表达式在输入字符串中是否找到匹配项
{
sb.Append(stringChar[i]);//将信息追加到当前 StringBuilder 的结尾
nLength += 2;
}
else
{
sb.Append(stringChar[i]);
nLength = nLength + 1;
}
if (nLength > length)//替换字符串
{
isCut = true;
break;
}
}
if (isCut)
return sb.ToString() + "...";
else
return sb.ToString();
#endregion
}
/// 弹出JavaScript小窗口
/// </summary>
/// <param name="js">窗口信息</param>
public static void Alert(string message)
{
#region
string js = @"<Script language='JavaScript'>
alert('" + message + "');</Script>";
HttpContext.Current.Response.Write(js);

#endregion
}
public static void GridViewHeader(GridView gdv)//显示表头并显示没有数据的提示信息
{
//表头的设置
GridViewRow row = new GridViewRow(-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
foreach (DataControlField field in gdv.Columns)
{
TableCell cell = new TableCell();
cell.Text = field.HeaderText;
cell.Width = field.HeaderStyle.Width;
cell.Height = field.HeaderStyle.Height;
cell.ForeColor = field.HeaderStyle.ForeColor;
cell.Font.Size = field.HeaderStyle.Font.Size;
cell.Font.Bold = field.HeaderStyle.Font.Bold;
cell.Font.Name = field.HeaderStyle.Font.Name;
cell.Font.Strikeout = field.HeaderStyle.Font.Strikeout;
cell.Font.Underline = field.HeaderStyle.Font.Underline;
cell.BackColor = field.HeaderStyle.BackColor;
cell.VerticalAlign = field.HeaderStyle.VerticalAlign;
cell.HorizontalAlign = field.HeaderStyle.HorizontalAlign;
cell.CssClass = field.HeaderStyle.CssClass;
cell.BorderColor = field.HeaderStyle.BorderColor;
cell.BorderStyle = field.HeaderStyle.BorderStyle;
cell.BorderWidth = field.HeaderStyle.BorderWidth;
row.Cells.Add(cell);
}
TableItemStyle headStyle = gdv.HeaderStyle;
TableItemStyle emptyStyle = gdv.EmptyDataRowStyle;
emptyStyle.Width = headStyle.Width;
emptyStyle.Height = headStyle.Height;
emptyStyle.ForeColor = headStyle.ForeColor;
emptyStyle.Font.Size = headStyle.Font.Size;
emptyStyle.Font.Bold = headStyle.Font.Bold;
emptyStyle.Font.Name = headStyle.Font.Name;
emptyStyle.Font.Strikeout = headStyle.Font.Strikeout;
emptyStyle.Font.Underline = headStyle.Font.Underline;
emptyStyle.BackColor = headStyle.BackColor;
emptyStyle.VerticalAlign = headStyle.VerticalAlign;
emptyStyle.HorizontalAlign = headStyle.HorizontalAlign;
emptyStyle.CssClass = headStyle.CssClass;
emptyStyle.BorderColor = headStyle.BorderColor;
emptyStyle.BorderStyle = headStyle.BorderStyle;
emptyStyle.BorderWidth = headStyle.BorderWidth;
//空白行的设置
GridViewRow row1 = new GridViewRow(0, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
TableCell cell1 = new TableCell();
cell1.Text = "没有相关数据可以显示！";
cell1.BackColor = System.Drawing.Color.White;
row1.Cells.Add(cell1);
cell1.ColumnSpan = 6;//合并列
if (gdv.Controls.Count == 0)
{
gdv.Page.Response.Write("<script language='javascript'>alert('必须在初始化表格类之前执行DataBind方法并设置EmptyDataText属性不为空!');</script>");
}
else
{
gdv.Controls[0].Controls.Clear();
gdv.Controls[0].Controls.AddAt(0, row);
gdv.Controls[0].Controls.AddAt(1, row1);
}
}
}