記錄程式相關的一些實用語法: [轉貼] GridView72大絕技 #2

出處：http://blog.csdn.net/21aspnet/article/details/1540301

快速預覽：01 GridView無代碼分頁排序
02 GridView選中，編輯，取消，刪除
03 GridView正反雙向排序
04 GridView和下拉菜單DropDownList結合
05 GridView和CheckBox結合
06 鼠標移到GridView某一行時改變該行的背景色方法一
07 鼠標移到GridView某一行時改變該行的背景色方法二
08 GridView實現刪除時彈出確認對話框
09 GridView實現自動編號
10 GridView實現自定義時間貨幣等字符串格式
11 GridView實現用「...」代替超長字符串
12 GridView一般換行與強制換行
13 GridView顯示隱藏某一列
14 GridView彈出新頁面/彈出新窗口
15 GridView固定表頭(不用javascript只用CSS，2行代碼，很好用)
16 GridView合併表頭多重表頭無錯完美版（以合併3列3行舉例）
17 GridView突出顯示某一單元格（例如金額低於多少，分數不及格等）
18 GridView加入自動求和求平均值小計
19 GridView數據導入Excel/Excel數據讀入GridView

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8.GridView實現刪除時彈出確認對話框：

效果圖：

實現方法：雙擊GridView的OnRowDataBound事件；
在後台的GridView1_RowDataBound()方法添加代碼，最後代碼如下所示：

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        //如果是綁定數據行
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
             if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate)
            {
                ((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你確認要刪除：/"" + e.Row.Cells[1].Text + "/"嗎?')");
            }
        }

}

9.GridView實現自動編號：

效果圖：

實現方法：雙擊GridView的OnRowDataBound事件；
在後台的GridView1_RowDataBound()方法添加代碼，最後代碼如下所示：
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        //如果是綁定數據行 //清清月兒http://blog.csdn.net/21aspnet
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            ////鼠標經過時，行背景色變
            //e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#E6F5FA'");
            ////鼠標移出時，行背景色變
            //e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'");

            ////當有編輯列時，避免出錯，要加的RowState判斷
            //if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate)
            //{
            //    ((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你確認要刪除：/"" + e.Row.Cells[1].Text + "/"嗎?')");
            //}

        }
        if (e.Row.RowIndex != -1)
        {
            int id = e.Row.RowIndex + 1;
            e.Row.Cells[0].Text = id.ToString();
        }

}

注意這時最好把前台的第一列的表頭該為「編號」，因為以前的第一列被「吃掉」了。
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="3" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing"
                        OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" OnRowDataBound="GridView1_RowDataBound">
                        <FooterStyle BackColor="White" ForeColor="#000066" />
                        <Columns>
                            <asp:BoundField DataField="身份證號碼" HeaderText="編號" ReadOnly="True" />
                            <asp:BoundField DataField="姓名" HeaderText="用戶姓名" />
                            <asp:BoundField DataField="員工性別" HeaderText="性別" />
                            <asp:BoundField DataField="家庭住址" HeaderText="家庭住址" />
                            <asp:CommandField HeaderText="選擇" ShowSelectButton="True" />
                            <asp:CommandField HeaderText="編輯" ShowEditButton="True" />
                            <asp:CommandField HeaderText="刪除" ShowDeleteButton="True" />
                        </Columns>
                        <RowStyle ForeColor="#000066" />
                        <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
                        <PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
                        <HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
                    </asp:GridView>

10.GridView實現自定義時間貨幣等字符串格式：

效果圖：
圖1-未格式化前

圖2-格式化後

解決方法：
在asp.net 2.0中，如果要在綁定列中顯示比如日期格式等，如果用下面的方法是顯示不了的

主要是由於htmlencode屬性默認設置為true,已防止XSS攻擊，安全起見而用的，所以，可以有以下兩種方法解決

1、

將htmlencode設置為false即可

另外的解決方法為，使用模版列

前台代碼：<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="身份證號碼"
            DataSourceID="SqlDataSource1" AllowSorting="True" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" CellPadding="3" Font-Size="12px" OnRowDataBound="GridView1_RowDataBound">
            <Columns>
                <asp:BoundField DataField="身份證號碼" HeaderText="身份證號碼" ReadOnly="True" SortExpression="身份證號碼" />
                <asp:BoundField DataField="姓名" HeaderText="姓名" SortExpression="姓名" />
                <asp:BoundField DataField="郵政編碼" HeaderText="郵政編碼" SortExpression="郵政編碼" />
                <asp:BoundField DataField="出生日期" HeaderText="出生日期" SortExpression="出生日期" />
                <asp:BoundField DataField="起薪" HeaderText="起薪" SortExpression="起薪" />
            </Columns>
            <FooterStyle BackColor="White" ForeColor="#000066" />
            <RowStyle ForeColor="#000066" />
            <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
            <PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
            <HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:北風貿易ConnectionString1 %>"
            SelectCommand="SELECT top 5 [出生日期], [起薪], [身份證號碼], [姓名], [家庭住址], [郵政編碼] FROM [飛狐工作室]" DataSourceMode="DataReader"></asp:SqlDataSource>

附錄-常用格式化公式：{0:C} 貨幣；
{0:D4}由0填充的4個字符寬的字段中顯示整數；
{0:000.0}四捨五入小數點保留第幾位有效數字；
{0:N2}小數點保留2位有效數字；{0:N2}% 小數點保留2位有效數字加百分號；
{0:D}長日期；{0:d}短日期；{0:yy-MM-dd} 例如07-3-25；；{0:yyyy-MM-dd} 例如2007-3-25

11.GridView實現用「...」代替超長字符串：

效果圖：

解決方法：數據綁定後過濾每一行即可for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
        {
            DataRowView mydrv;
            string gIntro;
            if (GridView1.PageIndex == 0)
            {
                mydrv = myds.Tables["飛狐工作室"].DefaultView[i];//表名
                gIntro = Convert.ToString(mydrv["家庭住址"]);//所要處理的字段
                GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2);
            }
            else
            {
                mydrv = myds.Tables["飛狐工作室"].DefaultView[i + (5 * GridView1.PageIndex)];
                gIntro = Convert.ToString(mydrv["家庭住址"]);
                GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2);
            }
        }

調用的方法：

    public string SubStr(string sString, int nLeng)
    {
        if (sString.Length <= nLeng)
        {
            return sString;
        }
        string sNewStr = sString.Substring(0, nLeng);
        sNewStr = sNewStr + "...";
        return sNewStr;
    }

後台全部代碼：using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
    SqlConnection sqlcon;
    SqlCommand sqlcom;
    string strCon = "Data Source=(local);Database=北風貿易;Uid=sa;Pwd=sa";
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ViewState["SortOrder"] = "身份證號碼";
            ViewState["OrderDire"] = "ASC";
            bind();
        }
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        bind();
    }
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string sqlstr = "delete from 飛狐工作室 where 身份證號碼='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
        sqlcon = new SqlConnection(strCon);
        sqlcom = new SqlCommand(sqlstr,sqlcon);
        sqlcon.Open();
        sqlcom.ExecuteNonQuery();
        sqlcon.Close();
        bind();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        sqlcon = new SqlConnection(strCon);
        string sqlstr = "update 飛狐工作室 set 姓名='"
            + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='"
            + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份證號碼='"
            + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
        sqlcom=new SqlCommand(sqlstr,sqlcon);
        sqlcon.Open();
        sqlcom.ExecuteNonQuery();
        sqlcon.Close();
        GridView1.EditIndex = -1;
        bind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        bind();
    }
    public void bind()
    {
        string sqlstr = "select top 5 * from 飛狐工作室";
        sqlcon = new SqlConnection(strCon);
        SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
        DataSet myds = new DataSet();
        sqlcon.Open();
        myda.Fill(myds, "飛狐工作室");
        GridView1.DataSource = myds;
        GridView1.DataKeyNames = new string[] { "身份證號碼" };
        GridView1.DataBind();
        for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
        {
            DataRowView mydrv;
            string gIntro;
            if (GridView1.PageIndex == 0)
            {
                mydrv = myds.Tables["飛狐工作室"].DefaultView[i];
                gIntro = Convert.ToString(mydrv["家庭住址"]);
                GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2);
            }
            else
            {
                mydrv = myds.Tables["飛狐工作室"].DefaultView[i + (5 * GridView1.PageIndex)];
                gIntro = Convert.ToString(mydrv["家庭住址"]);
                GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2);
            }
        }

        sqlcon.Close();
    }
    public string SubStr(string sString, int nLeng)
    {
        if (sString.Length <= nLeng)
        {
            return sString;
        }
        string sNewStr = sString.Substring(0, nLeng);
        sNewStr = sNewStr + "...";
        return sNewStr;
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        //如果是綁定數據行
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            ////鼠標經過時，行背景色變
            //e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#E6F5FA'");
            ////鼠標移出時，行背景色變
            //e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'");

        }
        if (e.Row.RowIndex != -1)
        {
            int id = e.Row.RowIndex + 1;
            e.Row.Cells[0].Text = id.ToString();
        }

}
}

12.GridView一般換行與強制換行：

效果圖：
首先設置<asp:BoundField DataField="家庭住址" HeaderText="家庭住址" ItemStyle-Width="100" />
gridview裡有一列綁定的數據很長，顯示的時候在一行裡面顯示，頁面拉得很寬。
原因是連續英文段為一個整體導致的，在RowDataBound中添加上了一句e.Row.Cells[2].Style.Add("word-break", "break-all")就可以。

如果要給所有的列增加此屬性：
protected void Page_Load(object sender, EventArgs e)
    {
        //正常換行
        GridView1.Attributes.Add("style", "word-break:keep-all;word-wrap:normal");
        //下面這行是自動換行
        GridView1.Attributes.Add("style", "word-break:break-all;word-wrap:break-word");
        if (!IsPostBack)
        {
             bind();//調用數據綁定即可
        }
    }
總之：善用CSS的word-break:break-all;word-wrap:break-word屬性即可，這個屬性是通用的對於頑固的南換行問題都可以解決，不局限於GridView。

13.GridView顯示隱藏某一列：本方案為月兒獨創，不同於網上其他方式，我覺得用一個CheckBox更人性化，這樣可以隱藏不必要的列，讓用戶自己選擇需要出現的列，在處理多列時這是一個很好的解決方案！

效果圖：
圖1-開始

圖2-點擊顯示的CheckBox後

解決方案：public void bind()
    {
        string sqlstr = "select top 5 * from 飛狐工作室";
        sqlcon = new SqlConnection(strCon);
        SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
        DataSet myds = new DataSet();
        sqlcon.Open();
        myda.Fill(myds, "飛狐工作室");
        GridView1.DataSource = myds;
        GridView1.DataKeyNames = new string[] { "身份證號碼" };
        GridView1.DataBind();
        sqlcon.Close();
        GridView1.Columns[3].Visible = false;//一開始隱藏
        CheckBox1.Checked = false;//如果不這樣後面的代碼會把他True
    }

雙擊CheckBox1，在CheckedChanged方法裡寫上代碼，最後代碼如下：
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
    {
         GridView1.Columns[3].Visible=! GridView1.Columns[3].Visible;
         Response.Write("GridView1的第4列現在的顯示隱藏狀態是："+GridView1.Columns[3].Visible.ToString());
    }

注意：CheckBox1的AutoPostBack要True！

後台全部代碼如下：

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
    SqlConnection sqlcon;
    SqlCommand sqlcom;
    string strCon = "Data Source=(local);Database=北風貿易;Uid=sa;Pwd=sa";
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ViewState["SortOrder"] = "身份證號碼";
            ViewState["OrderDire"] = "ASC";
            bind();
                   }
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        bind();
    }
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string sqlstr = "delete from 飛狐工作室 where 身份證號碼='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
        sqlcon = new SqlConnection(strCon);
        sqlcom = new SqlCommand(sqlstr,sqlcon);
        sqlcon.Open();
        sqlcom.ExecuteNonQuery();
        sqlcon.Close();
        bind();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        sqlcon = new SqlConnection(strCon);
        string sqlstr = "update 飛狐工作室 set 姓名='"
            + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='"
            + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份證號碼='"
            + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
        sqlcom=new SqlCommand(sqlstr,sqlcon);
        sqlcon.Open();
        sqlcom.ExecuteNonQuery();
        sqlcon.Close();
        GridView1.EditIndex = -1;
        bind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        bind();
    }
    public void bind()
    {
        string sqlstr = "select top 5 * from 飛狐工作室";
        sqlcon = new SqlConnection(strCon);
        SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
        DataSet myds = new DataSet();
        sqlcon.Open();
        myda.Fill(myds, "飛狐工作室");
        GridView1.DataSource = myds;
        GridView1.DataKeyNames = new string[] { "身份證號碼" };
        GridView1.DataBind();
        sqlcon.Close();
        GridView1.Columns[3].Visible = false;
        CheckBox1.Checked = false;
    }
    protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
    {
         GridView1.Columns[3].Visible=! GridView1.Columns[3].Visible;
         Response.Write("GridView1的第4列現在的顯示隱藏狀態是："+GridView1.Columns[3].Visible.ToString());
    }
}

前台代碼：<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>GridView顯示隱藏列清清月兒http://blog.csdn.net/21aspnet </title>
</head>
<body style="font-size=12px">
    <form id="form1" runat="server">
    <div>
                   <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="3" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing"
                        OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" >
                        <FooterStyle BackColor="White" ForeColor="#000066" />
                        <Columns>
                            <asp:BoundField DataField="身份證號碼" HeaderText="編號" ReadOnly="True" />
                            <asp:BoundField DataField="姓名" HeaderText="用戶姓名" />
                            <asp:BoundField DataField="郵政編碼" HeaderText="郵政編碼" SortExpression="郵政編碼" />
                            <asp:BoundField DataField="家庭住址" HeaderText="家庭住址" />
                            <asp:CommandField HeaderText="選擇" ShowSelectButton="True" />
                            <asp:CommandField HeaderText="編輯" ShowEditButton="True" />
                            <asp:CommandField HeaderText="刪除" ShowDeleteButton="True" />
                        </Columns>
                        <RowStyle ForeColor="#000066" />
                        <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
                        <PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
                        <HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
                    </asp:GridView>
        <asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="True" Font-Size="12px"
            OnCheckedChanged="CheckBox1_CheckedChanged" Text="顯示隱藏家庭住址" /></div>
    </form>
</body>
</html>

14.GridView彈出新頁面/彈出制定大小位置新窗口：

效果圖：

方案一：簡單的方法，新窗口不固定大小
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="3" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing"
                        OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" >
                        <FooterStyle BackColor="White" ForeColor="#000066" />
                        <Columns>
                            <asp:BoundField DataField="身份證號碼" HeaderText="編號" ReadOnly="True" />
                            <asp:BoundField DataField="郵政編碼" HeaderText="郵政編碼" SortExpression="郵政編碼" />
                            <asp:BoundField DataField="家庭住址" HeaderText="家庭住址" />
                            <asp:HyperLinkField HeaderText="姓名" Text="姓名" DataNavigateUrlFields="姓名" DataNavigateUrlFormatString="Default6.aspx?GoodsID={0}" Target="mainframe" NavigateUrl="~/Default6.aspx" DataTextField="姓名" >
                    </asp:HyperLinkField>                            <asp:CommandField HeaderText="選擇" ShowSelectButton="True" />
                            <asp:CommandField HeaderText="編輯" ShowEditButton="True" />
                            <asp:CommandField HeaderText="刪除" ShowDeleteButton="True" />
                        </Columns>
                        <RowStyle ForeColor="#000066" />
                        <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
                        <PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
                        <HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
                    </asp:GridView>
DataNavigateUrlFields是鏈接的字段名，DataNavigateUrlFormatString是路徑。

方案二：精確控制彈出窗口大小位置
<asp:HyperLinkColumn DataNavigateUrlField="EmployeeID" DataNavigateUrlFormatString="javascript:varwin=window.open('detail.aspx?ID={0}',null,'width=300,height=200');window.Close();"
DataTextField="LastName" HeaderText="LastName"></asp:HyperLinkColumn>

使用的是結合javascript的window.open方法，關於window.open的參數網上有很多帖子，本站也有許多參考
彈出窗口大全 http://blog.csdn.net/21aspnet/archive/2004/10/25/150231.aspx 即可！

記錄程式相關的一些實用語法

2013年9月17日星期二

[轉貼] GridView72大絕技 #2

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張貼留言

2013年9月17日 星期二

[轉貼] GridView72大絕技 #2

沒有留言:

張貼留言

2013年9月17日星期二