SqlDataSource的选择参数

Question

这里是我的SQL数据源的详细信息

<asp:SqlDataSource ID="dsMoodleQuiz" runat="server" 
    ConnectionString="<%$ ConnectionStrings:OnlineMeetingConnectionString %>" 
    ProviderName="<%$ ConnectionStrings:OnlineMeetingConnectionString.ProviderName %>" 

    SelectCommand="SELECT Name, UserID, Grade, FirstName, LastName, Email, TimeModified, IDNumber FROM tbMoodleQuiz WHERE (FirstName = @FirstName) AND (LastName = @LastName)" 
    onselecting="dsMoodleQuiz_Selecting"> 
    <SelectParameters> 
     <asp:Parameter Name="FirstName" /> 
     <asp:Parameter Name="LastName" /> 
    </SelectParameters> 
</asp:SqlDataSource> 

一个GridView的名字gvDetails连接到dsMoodleQuiz。在button click我想要

gridview得到填充。

这里是按钮的代码单击

protected void btnSearch_Click(object sender, EventArgs e) 
{ 
    dsMoodleQuiz.SelectParameters.Add("@FirstName", System.Data.DbType.String, "Jhon"); 
    dsMoodleQuiz.SelectParameters.Add("@LastName", System.Data.DbType.String, "Wald"); 

    GridView1.DataBind(); 
} 

这是为什么不工作...？我是否缺少任何代码...？感谢帮助

Answer 1

这是一个关于如何搜索网格视图和填充效果使用的SqlDataSource是搜索标准样品例如.....

网格视图结合.....

 <asp:GridView ID="Gridview1" runat="server" AutoGenerateColumns="False" AllowPaging="True" 
AllowSorting="true" DataSourceID="dsGridview" Width="540px" PageSize="10"> 
<Columns> 
    <asp:BoundField DataField="id" HeaderText="ID" SortExpression="id" /> 
    <asp:TemplateField HeaderText="First Name" SortExpression="FirstName"> 
     <ItemStyle Width="120px" HorizontalAlign="Left" /> 
     <ItemTemplate> 
      <asp:Label ID="lblFirstname" Text='<%# HighlightText(Eval("FirstName")) %>' 
       runat="server" /> 
     </ItemTemplate> 
    </asp:TemplateField> 
    <asp:TemplateField HeaderText="Last Name" SortExpression="LastName"> 
     <ItemStyle Width="120px" HorizontalAlign="Left" /> 
     <ItemTemplate> 
      <asp:Label ID="lblLastname" Text='<%# HighlightText(Eval("LastName")) %>' 
      runat="server" /> 
     </ItemTemplate> 
    </asp:TemplateField> 
    <asp:BoundField DataField="Department" HeaderText="Department" 
     SortExpression="Department" ItemStyle-Width="130px" /> 
    <asp:BoundField DataField="Location" HeaderText="Location" 
     SortExpression="Location" ItemStyle-Width="130px" /> 
</Columns> 
</asp:GridView> 

和SQL数据源是这样的...

<asp:SqlDataSource ID="SqlDataSource1" runat="server" SelectCommand="SELECT * FROM People" 
    ConnectionString="<%$ ConnectionStrings:ConnectionString %>" 
    FilterExpression="firstname like '%{0}%' or lastname like '%{1}%'"> 
    <FilterParameters> 
     <asp:ControlParameter Name="firstname" ControlID="txtSearch" PropertyName="Text" /> 
     <asp:ControlParameter Name="lastname" ControlID="txtSearch" PropertyName="Text" /> 
    </FilterParameters> 
    </asp:SqlDataSource> 

添加文本框进行搜索..

<asp:TextBox ID="txtSearch" runat="server" /> 
<asp:ImageButton ID="btnSearch" ImageUrl="images/searchbutton.png" runat="server" /> 
<asp:ImageButton ID="btnClear" ImageUrl="images/clearbutton.png" runat="server" /> 

，这是用于结合和将文本输入到文本框中

using System.Text.RegularExpressions; 
Partial; 
class GridviewwithHighlightedSearch : System.Web.UI.Page { 

    // Create a String to store our search results 
    private string SearchString = ""; 

    string HighlightText(string InputTxt) { 
     // This function is called whenever text is displayed in the FirstName and LastName 
     // fields from our database. If we're not searching then just return the original 
     // input, this speeds things up a bit 
     if ((SearchString == "")) { 
      return InputTxt; 
     } 
     else { 
      // Otherwise create a new regular expression and evaluate the FirstName and 
      // LastName fields against our search string. 
      Regex ResultStr; 
      ResultStr = new Regex(SearchString.Replace(" ", "|"), RegexOptions.IgnoreCase); 
      return ResultStr.Replace(InputTxt, new MatchEvaluator(new System.EventHandler(this.ReplaceWords))); 
     } 
    } 

    public string ReplaceWords(Match m) { 
     // This match evaluator returns the found string and adds it a CSS class I defined 
     // as 'highlight' 
     return ("<span class=highlight>" 
        + (m.ToString + "</span>")); 
    } 

    protected void btnClear_Click(object sender, System.Web.UI.ImageClickEventArgs e) { 
     // Simple clean up text to return the Gridview to it's default state 
     txtSearch.Text = ""; 
     SearchString = ""; 
     Gridview1.DataBind(); 
    } 

    protected void btnSearch_Click(object sender, System.Web.UI.ImageClickEventArgs e) { 
     // Set the value of the SearchString so it gets 
     SearchString = txtSearch.Text; 
    } 
} 

并且这是用于高亮显示了CSS样式..

代码，这是对于上述网格视图TEH图像

<style type="text/css"> 
    .highlight {text-decoration: none;color:black;background:yellow;} 
</style> 

我希望它会帮助你...

Answer 2

在databaindg

dsMoodleQuiz.SelectParmeter['FirstName'].DefaultValue = 'John'; 
dsMoodleQuiz.SelectParmeter['LastName'].DefaultValue = 'Wald'; 

gridView1.DataBind(); 

注意使用下面的代码：我没有Visual Studio中我，所以代码是不可复制，pastable。