无法在System.Int32和System.String上执行“Like”操作。 [英] Cannot perform 'Like' operation on System.Int32 and System.String.
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问题描述
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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 id="Head1" runat="server">
<title>Highlight the Search Keywords in Gridview </title>
<style type="text/css">
.GridviewDiv {font-size: 100%; font-family: 'Lucida Grande', 'Lucida Sans Unicode', Verdana, Arial, Helevetica, sans-serif; color: #303933;}
Table.Gridview{border:solid 1px #df5015;}
.Gridview th{color:#FFFFFF;border-right-color:#abb079;border-bottom-color:#abb079;padding:0.5em 0.5em 0.5em 0.5em;text-align:center}
.Gridview td{border-bottom-color:#f0f2da;border-right-color:#f0f2da;padding:0.5em 0.5em 0.5em 0.5em;}
.Gridview tr{color: Black; background-color: White; text-align:left}
:link,:visited { color: #DF4F13; text-decoration:none }
.highlight {text-decoration: none;color:black;background:yellow;}
</style>
</head>
<body>
<form id="form1" runat="server">
<div class="GridviewDiv">
<p>
Enter UserName :
<asp:TextBox ID="txtSearch" runat="server" />
<asp:ImageButton ID="btnSearch" ImageUrl="~/SearchButton.png" runat="server"
Style="top: 5px; position: relative" onclick="btnSearch_Click" />
<asp:ImageButton ID="btnClear" ImageUrl="~/Clearbutton.png" runat="server" Style="top: 5px;
position: relative" onclick="btnClear_Click" /><br />
<br />
</p>
<asp:GridView ID="gvDetails" runat="server" AutoGenerateColumns="False" AllowPaging="True"
AllowSorting="True" DataSourceID="dsDetails" Width="540px" CssClass="Gridview"
DataKeyNames="voucherID" >
<HeaderStyle BackColor="#df5015" />
<Columns>
<asp:BoundField DataField="voucherID" HeaderText="voucherID" InsertVisible="False"
ReadOnly="True" SortExpression="voucherID" />
<asp:BoundField DataField="voucher" HeaderText="voucher"
SortExpression="voucher" />
<asp:BoundField DataField="RS" HeaderText="RS"
SortExpression="RS" />
<asp:BoundField DataField="CPoints" HeaderText="CPoints"
SortExpression="CPoints" />
<asp:BoundField DataField="Datec" HeaderText="Datec" SortExpression="Datec" />
</Columns>
</asp:GridView>
</div>
<asp:AccessDataSource ID="dsDetails" runat="server"
DataFile="~/App_Data/DatabasePCG03.mdb"
SelectCommand="SELECT * FROM [coupen]"
FilterExpression="voucherID LIKE '%{0}%' OR voucher LIKE '%{0}%' OR RS LIKE '%{0}%'OR CPoints LIKE '%{0}%'OR Datec LIKE '%{0}%'">
<FilterParameters>
<asp:ControlParameter Name="voucherID" ControlID="txtSearch" PropertyName="Text" />
<asp:ControlParameter Name="voucher" ControlID="txtSearch" PropertyName="Text" />
<asp:ControlParameter Name="RS" ControlID="txtSearch" PropertyName="Text" />
<asp:ControlParameter Name="CPoints" ControlID="txtSearch" PropertyName="Text" />
<asp:ControlParameter Name="Datec" ControlID="txtSearch" PropertyName="Text" />
</FilterParameters>
</asp:AccessDataSource>
</form>
</body>
</html>
推荐答案
就像你不应该使用整数值。你可以检查在OR条件之前是否有空白区域。我可以在两个地方看到你错过了它（RS LIKE''％{0}％''或CPoints LIKE''％{0}％''或Datec）。
LIKE you shouldn''t be doing with integer values. Can you check if putting white-space before OR condition helps with this. I can see at two places you have missed it(RS LIKE ''%{0}%''OR CPoints LIKE ''%{0}%''OR Datec).
voucherID LIKE ''%{0}%'' OR voucher LIKE ''%{0}%'' OR RS LIKE ''%{0}%'' OR CPoints LIKE ''%{0}%'' OR Datec LIKE ''%{0}%''
LIKE表达式仅适用于字符串和字符串列。你不能使用LIKE的整数或数字列，除非你将涉及的数字转换为字符串。
TheLIKEexpression only works on strings and string columns. You can''t use an integer or numeric column withLIKE, well, unless you convert the number involved to a string.
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