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horizontalalign

horizontalalign（horizontalalignment）

admin admin 发表于2023-04-13 00:10:18 浏览79 评论0

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如何让gridview在没有数据时显示表头

如何让gridview在没有数据时显示表头

1．前言

当对GridView控件进行数据绑定时，如果绑定的记录为空，网页上就不显示GridView，造成页面部分空白，页面布局结构也受影响。下面讨论的方法可以让GridView在没有数据记录的时候显示表的字段结构和显示提示信息。-horizontalalign

2．数据

为了让GridView显示数据，在数据库中建立表temple，其字段如下：

temple表示庙宇，它的字段有：

temple_id int

temple_name varchar(50)

location varchar(50)

build_date datetime

3．页面

建立一个asp.net网站首悄工程，在页面中添加GridView和几个按钮，代码如下所示：

%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %

!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" ""

html xmlns=""

head runat="server"

titleGridView绑定记录为空显示表头测试/title

/head

body

form id="form1" runat="server"

div style="font-size:13px;"

asp:GridView ID="GridViewEmptyDataTest" runat="server" AutoGenerateColumns="False" EmptyDataText="Data Is Empty" BackColor="White" BorderColor="LightGray" BorderStyle="Double" BorderWidth="3px"-horizontalalign

CellPadding="4" GridLines="Horizontal" Width="500px"

Columns

asp:BoundField DataField="temple_id" HeaderText="temple_id" Visible="False"者拆渣

/asp:BoundField

asp:BoundField DataField="temple_name" HeaderText="名称"

ItemStyle BorderColor="LightGray" BorderStyle="Double" BorderWidth="1px" Width="100px" /

/asp:BoundField

asp:BoundField DataField="location" HeaderText="地址"

ItemStyle BorderColor="LightGray" BorderStyle="Double" BorderWidth="1px"御闭 Width="300px" /

/asp:BoundField

asp:BoundField DataField="build_date" HeaderText="建设时间"

ItemStyle BorderColor="LightGray" BorderStyle="Double" BorderWidth="1px" Width="100px" /

/asp:BoundField

/Columns

FooterStyle BackColor="White" ForeColor="#333333" /

RowStyle BackColor="White" ForeColor="#333333" /

SelectedRowStyle BackColor="#339966" Font-Bold="True" ForeColor="White" /

PagerStyle BackColor="#336666" ForeColor="White" HorizontalAlign="Center" /

HeaderStyle BackColor="CornflowerBlue" Font-Bold="True" ForeColor="White" /

/asp:GridView

br /

asp:Button ID="ButtonHasDataBind" runat="server" Text="有数据绑定" Width="109px" OnClick="ButtonHasDataBind_Click" /-horizontalalign

asp:Button ID="ButtonQueryEmptyBind" runat="server" Text="查询结果为空绑定" Width="142px" OnClick="ButtonQueryEmptyBind_Click" /-horizontalalign

asp:Button ID="ButtonConstructTableBind" runat="server" Text="构造空的DataTable绑定" Width="164px" OnClick="ButtonConstructTableBind_Click" /-horizontalalign

asp:Button ID="ButtonNormalBind" runat="server" Text="普通空数据绑定" Width="127px" OnClick="ButtonNormalBind_Click" //div-horizontalalign

/form

/body

/html

GridView要绑定的字段和temple的字段一样，在这里我们利用GridView原有的功能，设定当数据为空是显示“Data Is Empty”，如果没有设定EmptyDataText属性，当绑定的记录为空时，GridView将不在页面显示。-horizontalalign

gridview 表头如何居中

vs 2008

Private Sub tableHeadSet()

'/* set the table head */

Dim tcHeader As TableCellCollection = GridView1.HeaderRow.Cells

'第告斗一行表头

tcHeader.Clear()

tcHeader.Add(New TableHeaderCell())

tcHeader(0).BackColor = Drawing.Color.DarkBlue

tcHeader(0).ForeColor = Drawing.Color.White

tcHeader(0).Height = 30

tcHeader(0).Attributes.Add("colspan", "16") '跨Column

'tcHeader(0).Font.Size = 9

'tcHeader(0).Font.Bold = False

tcHeader(0).Text = "采油井参数显示镇源/袜旅磨th/trtr"

'第二行表头

tcHeader.Add(New TableHeaderCell())

tcHeader(1).BackColor = Drawing.Color.DarkMagenta

tcHeader(1).ForeColor = Drawing.Color.White

tcHeader(1).HorizontalAlign = HorizontalAlign.Center

tcHeader(1).Width = 150

tcHeader(1).Text = "油井名称"

tcHeader.Add(New TableHeaderCell())

tcHeader(2).BackColor = Drawing.Color.DarkGreen

tcHeader(2).ForeColor = Drawing.Color.White

tcHeader(2).HorizontalAlign = HorizontalAlign.Center

tcHeader(2).Width = 140

tcHeader(2).Text = "巡井时间"

tcHeader.Add(New TableHeaderCell())

tcHeader(3).BackColor = Drawing.Color.DarkMagenta

tcHeader(3).ForeColor = Drawing.Color.White

tcHeader(3).HorizontalAlign = HorizontalAlign.Center

tcHeader(3).Width = 80

tcHeader(3).Text = "油井状态"

tcHeader.Add(New TableHeaderCell())

tcHeader(4).BackColor = Drawing.Color.DarkGreen

tcHeader(4).HorizontalAlign = HorizontalAlign.Center

tcHeader(4).ForeColor = Drawing.Color.White

tcHeader(4).Width = 70

tcHeader(4).Text = "冲程(m)"

tcHeader.Add(New TableHeaderCell())

tcHeader(5).BackColor = Drawing.Color.DarkMagenta

tcHeader(5).ForeColor = Drawing.Color.White

tcHeader(5).HorizontalAlign = HorizontalAlign.Center

tcHeader(5).Width = 90

tcHeader(5).Text = "冲次(n/M)"

tcHeader.Add(New TableHeaderCell())

tcHeader(6).BackColor = Drawing.Color.DarkGreen

tcHeader(6).ForeColor = Drawing.Color.White

tcHeader(6).HorizontalAlign = HorizontalAlign.Center

tcHeader(6).Width = 80

tcHeader(6).Text = "最大载荷(KN)"

tcHeader.Add(New TableHeaderCell())

tcHeader(7).BackColor = Drawing.Color.DarkMagenta

tcHeader(7).ForeColor = Drawing.Color.White

tcHeader(7).HorizontalAlign = HorizontalAlign.Center

tcHeader(7).Width = 80

tcHeader(7).Text = "最小载荷(KN)"

tcHeader.Add(New TableHeaderCell())

tcHeader(8).BackColor = Drawing.Color.DarkGreen

tcHeader(8).ForeColor = Drawing.Color.White

tcHeader(8).HorizontalAlign = HorizontalAlign.Center

tcHeader(8).Width = 70

tcHeader(8).Text = "A相最大电流(A)"

tcHeader.Add(New TableHeaderCell())

tcHeader(9).BackColor = Drawing.Color.DarkMagenta

tcHeader(9).ForeColor = Drawing.Color.White

tcHeader(9).HorizontalAlign = HorizontalAlign.Center

tcHeader(9).Width = 70

tcHeader(9).Text = "A相最小电流(A)"

tcHeader.Add(New TableHeaderCell())

tcHeader(10).BackColor = Drawing.Color.DarkGreen

tcHeader(10).ForeColor = Drawing.Color.White

tcHeader(10).HorizontalAlign = HorizontalAlign.Center

tcHeader(10).Width = 70

tcHeader(10).Text = "Uab电压(V)"

tcHeader.Add(New TableHeaderCell())

tcHeader(11).BackColor = Drawing.Color.DarkMagenta

tcHeader(11).ForeColor = Drawing.Color.White

tcHeader(11).HorizontalAlign = HorizontalAlign.Center

tcHeader(11).Width = 70

tcHeader(11).Text = "Ubc电压(V)"

tcHeader.Add(New TableHeaderCell())

tcHeader(12).BackColor = Drawing.Color.DarkGreen

tcHeader(12).ForeColor = Drawing.Color.White

tcHeader(12).HorizontalAlign = HorizontalAlign.Center

tcHeader(12).Width = 70

tcHeader(12).Text = "Uca电压(V)"

tcHeader.Add(New TableHeaderCell())

tcHeader(13).BackColor = Drawing.Color.DarkMagenta

tcHeader(13).ForeColor = Drawing.Color.White

tcHeader(13).HorizontalAlign = HorizontalAlign.Center

tcHeader(13).Width = 70

tcHeader(13).Text = "A相电流(A)"

tcHeader.Add(New TableHeaderCell())

tcHeader(14).BackColor = Drawing.Color.DarkGreen

tcHeader(14).ForeColor = Drawing.Color.White

tcHeader(14).HorizontalAlign = HorizontalAlign.Center

tcHeader(14).Width = 70

tcHeader(14).Text = "B相电流(A)"

tcHeader.Add(New TableHeaderCell())

tcHeader(15).BackColor = Drawing.Color.DarkMagenta

tcHeader(15).ForeColor = Drawing.Color.White

tcHeader(15).HorizontalAlign = HorizontalAlign.Center

tcHeader(15).Width = 70

tcHeader(15).Text = "C相电流(A)"

tcHeader.Add(New TableHeaderCell())

tcHeader(16).BackColor = Drawing.Color.DarkGreen

tcHeader(16).ForeColor = Drawing.Color.White

tcHeader(16).HorizontalAlign = HorizontalAlign.Center

tcHeader(16).Width = 80

tcHeader(16).Text = "井口压力(Mpa)/th/trtr"

End Sub

要想使表头字体居中，要注意表头各列列宽，表头总列宽，才可以达到完美。

GridView1.Width = 1400

命名空间不能直接包含字段或方法之类的成员

APP_CODE 写的类 在同一WEB项目的代码手亮中使用庆薯槐不需要誉友额外引用。

namespace N

{

public Class XXX{}

}

在default.cs中只需要 N.XXX x=new N.XXX 即可。

DataTable绑定到datagrid后，怎么在程序中设置各列的居中属性

DataTable绑定到datagrid后，在程序中乱哪设置各列的居中属性方法：

使用下面的语句可以定义列标题的对齐方式

Datagrid1.Columns(0).Alignment = 2

Datagrid1.Refresh

其中困茄将Aligment设置为0为左对齐、1为右对齐、2为居中对齐

也可以用数据内容居汪陪察中

private void DataGrid_ItemDataBound(object sender, DataGridItemEventArgs e)

{

for (int i=0; i e.Item.Cells.Count; i++)

e.Item.Cells[i].HorizontalAlign=HorizontalAlign.Center;

}

asp.net中在Gridview中自定义一列操作，应该怎么做？

思前宽路：先定义慧态亮事件，在linkbutton上绑定事件，也就是一个CRUD的方法，然后在后台的OnRowCommand事件里调用绑定的事件即可。

具体举例如下：

1、前端的代码如下：

asp:GridView ID="gridViewDxjk" CssClass="gridview" runat="server" AllowPaging="True"

DataKeyNames="P_ID" AutoGenerateColumns="False"

RowStyle-HorizontalAlign="Center" BorderWidth="1px" PageSize="17"

onrowdeleting="gridViewDxjk_RowDeleting"

OnRowDataBound="gridViewDxjk_RowDataBound"

onpageindexchanging="gridViewDxjk_PageIndexChanging"

HeaderStyle CssClass="head" /

PagerStyle CssClass="pager" /

RowStyle CssClass="row" /

EditRowStyle CssClass="editrow" /

AlternatingRowStyle CssClass="altrow" /

EmptyDataRowStyle CssClass="empty" /

Columns

asp:HyperLinkField HeaderText="编辑" ControlStyle-Width="50" DataNavigateUrlFields="P_ID" DataNavigateUrlFormatString="smsModify.aspx?id={0}" Text="编辑" -horizontalalign

ControlStyle Width="50px"/ControlStyle/asp:HyperLinkField

asp:CommandField ShowDeleteButton="true" DeleteText="删除" 闭宏

ControlStyle Width="50px"/ControlStyle/asp:CommandField

asp:BoundField DataField="P_ID" HeaderText="id" SortExpression="P_ID" ItemStyle-HorizontalAlign="Center" Visible="False" -horizontalalign

ItemStyle HorizontalAlign="Center"/ItemStyle/asp:BoundField

asp:BoundField DataField="P_NAME" HeaderText="名称" SortExpression="P_NAME" /-horizontalalign

asp:BoundField DataField="P_Type" HeaderText="通知方式" SortExpression="P_Type" ItemStyle-HorizontalAlign="Center" -horizontalalign

ItemStyle HorizontalAlign="Center"/ItemStyle/asp:BoundField

asp:BoundField DataField="P_Fzr" HeaderText="姓名" SortExpression="P_Fzr" ItemStyle-HorizontalAlign="Center" -horizontalalign

ItemStyle HorizontalAlign="Center"/ItemStyle/asp:BoundField

asp:BoundField DataField="P_tel" HeaderText="通知手机" SortExpression="P_tel" ItemStyle-HorizontalAlign="Center" -horizontalalign

ItemStyle HorizontalAlign="Center"/ItemStyle/asp:BoundField

asp:BoundField DataField="P_jg" HeaderText="通知间隔(小时)" SortExpression="P_jg" ItemStyle-HorizontalAlign="Center" -horizontalalign

ItemStyle HorizontalAlign="Center"/ItemStyle/asp:BoundField

asp:BoundField DataField="P_on" HeaderText="是否开启" SortExpression="P_on" ItemStyle-HorizontalAlign="Center" -horizontalalign

ItemStyle HorizontalAlign="Center"/ItemStyle/asp:BoundField

asp:BoundField DataField="P_lasttime" HeaderText="最后发送时间" SortExpression="P_lasttime" ItemStyle-HorizontalAlign="Center" -horizontalalign

ItemStyle HorizontalAlign="Center"/ItemStyle/asp:BoundField

asp:BoundField DataField="P_memo" HeaderText="备注" SortExpression="P_memo" ItemStyle-HorizontalAlign="Center" -horizontalalign

ItemStyle HorizontalAlign="Center"/ItemStyle/asp:BoundField

/Columns

EmptyDataTemplate

没有数据！

/EmptyDataTemplate

PagerTemplate

table width="100%" class="gvPage" style="font-size:12px;"

tr

td style="text-align: right"

第asp:Label ID="lblPageIndex" runat="server" Text='%# ((GridView)Container.Parent.Parent).PageIndex + 1 %'/asp:Label页-horizontalalign

/共asp:Label ID="lblPageCount" runat="server" Text='%# ((GridView)Container.Parent.Parent).PageCount %'/asp:Label页 -horizontalalign

asp:LinkButton ID="LinkButtonFirstPage" runat="server" CommandArgument="First" CommandName="Page" Visible="%# ((GridView)Container.NamingContainer).PageIndex != 0 %"首页/asp:LinkButton-horizontalalign

asp:LinkButton ID="LinkButtonPreviousPage" runat="server" CommandArgument="Prev" CommandName="Page" Visible="%# ((GridView)Container.NamingContainer).PageIndex != 0 %"上一页/asp:LinkButton-horizontalalign

asp:LinkButton ID="LinkButtonNextPage" runat="server" CommandArgument="Next" CommandName="Page" Visible="%# ((GridView)Container.NamingContainer).PageIndex != ((GridView)Container.NamingContainer).PageCount - 1 %"下一页/asp:LinkButton-horizontalalign

asp:LinkButton ID="LinkButtonLastPage" runat="server" CommandArgument="Last" CommandName="Page" Visible="%# ((GridView)Container.NamingContainer).PageIndex != ((GridView)Container.NamingContainer).PageCount - 1 %"尾页/asp:LinkButton-horizontalalign

asp:TextBox ID="txtNewPageIndex" runat="server" Text='%# ((GridView)Container.Parent.Parent).PageIndex + 1 %' Width="20px" AutoPostBack="true" /asp:TextBox-horizontalalign

asp:LinkButton ID="btnGoEx" runat="server" CommandArgument="GO" CommandName="Page" Text="GO" OnClick="btnGoEx_Click"/asp:LinkButton-horizontalalign

/td

/tr

/table

/PagerTemplate

/asp:GridView

2、后端的话，由于需要弹出删除前的确认框，所以，这里需要在RowDataBound里面做点逻辑，同时，要想真正的删除，还需要触发RowDeleting事件，具体代码如下：

//报警删除

protected void gridViewDxjk_RowDeleting(object sender, GridViewDeleteEventArgs e)

{

string key = gridViewDxjk.DataKeys[e.RowIndex].Value.ToString();

bool flag = bll.Delete(Int32.Parse(key));

if (flag)

NXT_WLService.App_Code.JScript.Alert("删除成功！", this);

else

NXT_WLService.App_Code.JScript.Alert("删除失败！", this);

}

protected void gridViewDxjk_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

LinkButton btn = (LinkButton)e.Row.Cells[1].Controls[0];

if (btn.Text.Equals("删除"))//删除钮才加提示讯息

btn.OnClientClick = "if (confirm('你确认要删除?')) javascript:__doPostBack('gridViewDxjk','Delete$" + e.Row.RowIndex.ToString() + "'); else return false;";-horizontalalign

}

}