blocks|key|156596|text|Set+the+DataSource+and+call+DataBind()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|156597|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/fkx0cy6d.aspx^0|8|A|S|A|0|12|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

<a href="http://msdn.microsoft.com/en-us/library/fkx0cy6d.aspx" rel="nofollow">Set the <code>DataSource</code> and call <code>DataBind()</code></a>.

blocks|key|149154|text|将所有参数放在HiddenField中，其中一个HDF必须是用于决定select方法是否必须返回查询项的标志。请参阅此answer。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|149155|代码示例：|149156|FilterGridView.aspx：|149157|<%25@+Page+Language="C#"+AutoEventWireup="true"+CodeBehind="FilterGridView.aspx.cs"
++++Inherits="Q11876988WebApp.FilterGridView"+%25>

<!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></title>
</head>
<body>
++++<form+id="form1"+runat="server">
++++<div>
++++++++<%25--
++++++++Fields+for+user+inputs
++++++++--%25>
++++++++&nbsp;Id:
++++++++<asp:TextBox+ID="TxtId"+runat="server"></asp:TextBox>
++++++++&nbsp;Name:
++++++++<asp:TextBox+ID="TxtName"+runat="server"></asp:TextBox>
++++++++&nbsp;Phone:
++++++++<asp:TextBox+ID="TxtPhone"+runat="server"></asp:TextBox>
++++++++<%25--
++++++++Button+to+perform+query
++++++++--%25>
++++++++<asp:Button+ID="BtnQuery"+runat="server"+OnClick="BtnQuery_Click"+Text="Query"+/>
++++++++<%25--
++++++++Hidden+Fields+used+as+parameters
++++++++--%25>
++++++++<asp:HiddenField+ID="HdfId"+runat="server"+/>
++++++++<asp:HiddenField+ID="HdfName"+runat="server"+/>
++++++++<asp:HiddenField+ID="HdfPhone"+runat="server"+/>
++++++++<%25--'false':+Avoid+query+execution+before+'BtnQuery'+click.--%25>
++++++++<asp:HiddenField+ID="HdfDoQuery"+runat="server"+Value="false"+/>
++++++++<%25--
++++++++GridView
++++++++--%25>
++++++++<asp:GridView+ID="GrvMyData"+runat="server"+AutoGenerateColumns="False"+DataSourceID="OdsMyData">
++++++++++++<Columns>
++++++++++++++++<asp:BoundField+DataField="Id"+HeaderText="Id"+SortExpression="Id"+/>
++++++++++++++++<asp:BoundField+DataField="Name"+HeaderText="Name"+SortExpression="Name"+/>
++++++++++++++++<asp:BoundField+DataField="Phone"+HeaderText="Phone"+SortExpression="Phone"+/>
++++++++++++</Columns>
++++++++</asp:GridView>
++++++++<%25--
++++++++ObjectDataSource+and+parameters+related+to+Hidden+Fields
++++++++--%25>
++++++++<asp:ObjectDataSource+ID="OdsMyData"+runat="server"+OldValuesParameterFormatString="original_{0}"
++++++++++++SelectMethod="QueryMyDataPoco"+TypeName="Q11876988WebApp.FilterGridViewODS">
++++++++++++<SelectParameters>
++++++++++++++++<asp:ControlParameter+ControlID="HdfId"+ConvertEmptyStringToNull="False"+Name="id"
++++++++++++++++++++PropertyName="Value"+Type="String"+/>
++++++++++++++++<asp:ControlParameter+ControlID="HdfName"+ConvertEmptyStringToNull="False"+Name="name"
++++++++++++++++++++PropertyName="Value"+Type="String"+/>
++++++++++++++++<asp:ControlParameter+ControlID="HdfPhone"+ConvertEmptyStringToNull="False"+Name="phone"
++++++++++++++++++++PropertyName="Value"+Type="String"+/>
++++++++++++++++<asp:ControlParameter+ControlID="HdfDoQuery"+ConvertEmptyStringToNull="False"+Name="doQuery"
++++++++++++++++++++PropertyName="Value"+Type="Boolean"+/>
++++++++++++</SelectParameters>
++++++++</asp:ObjectDataSource>
++++</div>
++++</form>
</body>
</html>|code-block|syntax|javascript|149158|FilterGridView.aspx.cs：|149159|public+partial+class+FilterGridView+:+System.Web.UI.Page
{
++++protected+void+Page_Load(object+sender,+EventArgs+e)
++++{
++++}


++++protected+void+BtnQuery_Click(object+sender,+EventArgs+e)
++++{
++++++++//change+this+values+causes+the+'OdsMyData'+'DataBind'.
++++++++this.HdfId.Value+=+this.TxtId.Text;
++++++++this.HdfName.Value+=+this.TxtName.Text;
++++++++this.HdfPhone.Value+=+this.TxtPhone.Text;
++++++++this.HdfDoQuery.Value+=+true.ToString();
++++}
}|149160|FilterGridViewODS.cs：|149161|///+<summary>
///+Class+for+a+ObjectDataSource
///+</summary>
[DataObject]
public+class+FilterGridViewODS
{
++++private+static+IList<MyDataPoco>+MyDataList+=+new+List<MyDataPoco>();

++++///+<summary>
++++///+Static+constructor.+Creates+a+list+of+50+items.
++++///+</summary>
++++static+FilterGridViewODS()
++++{
++++++++for+(int+i+=+0;+i+<+50;+i%2B%2B)
++++++++{
++++++++++++MyDataList.Add(
++++++++++++++++new+MyDataPoco()
++++++++++++++++{
++++++++++++++++++++Id+=+i.ToString(),
++++++++++++++++++++Name+=+"Name+"+%2B+i,
++++++++++++++++++++Phone+=+i+%2B+""+%2B+i+%2B+""+%2B+i+%2B+"."+%2B+i+%2B+""+%2B+i+%2B+""+%2B+i+%2B+""+%2B+i+%2B+""
++++++++++++++++});
++++++++}
++++}

++++///+<summary>
++++///+if+<paramref+name="doQuery"/>+is+<c>true</c>,+performs+a+
++++///+query+over+the+data+content,+Otherwise+return+an+empty+list.
++++///+</summary>
++++[DataObjectMethod(DataObjectMethodType.Select)]
++++public+IEnumerable<MyDataPoco>+QueryMyDataPoco(String+id,+String+name,+String+phone,+bool+doQuery)
++++{
++++++++if+(doQuery)
++++++++{
++++++++++++IEnumerable<MyDataPoco>+filteredEnum+=
++++++++++++++++from+md+in+MyDataList
++++++++++++++++where
++++++++++++++++++++md.Id.Contains(id)
++++++++++++++++++++&&+md.Name.Contains(name)
++++++++++++++++++++&&+md.Phone.Contains(phone)
++++++++++++++++select+md;

++++++++++++return+filteredEnum;
++++++++}
++++++++else
++++++++{
++++++++++++//returning+an+empty+list.
++++++++++++return+new+List<MyDataPoco>();
++++++++}
++++}
}|149162|MyDataPoco.cs：|149163|public+class+MyDataPoco
{
++++public+String+Id+{+get;+set;+}
++++public+String+Name+{+get;+set;+}
++++public+String+Phone+{+get;+set;+}
}|149164|完整来源：Q11874496WebApp.7z|149165|entityMap|0|LINK|mutability|MUTABLE|url|https://dl.dropbox.com/u/49510149/stackoverflow/dotnet/Q11874496WebApp.7z|1^0|1N|6|0|0|0|0|0|0|0|0|0|0|0|5|I|1|0^^$0|@$1|2|3|4|5|6|7|19|8|@]|9|@$A|1A|B|1B|1|1C]]|C|$]]|$1|D|3|E|5|6|7|1D|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|1E|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|1F|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|1G|8|@]|9|@]|C|$]]|$1|O|3|P|5|J|7|1H|8|@]|9|@]|C|$K|L]]|$1|Q|3|R|5|6|7|1I|8|@]|9|@]|C|$]]|$1|S|3|T|5|J|7|1J|8|@]|9|@]|C|$K|L]]|$1|U|3|V|5|6|7|1K|8|@]|9|@]|C|$]]|$1|W|3|X|5|J|7|1L|8|@]|9|@]|C|$K|L]]|$1|Y|3|Z|5|6|7|1M|8|@]|9|@$A|1N|B|1O|1|1P]]|C|$]]|$1|10|3|-4|5|6|7|1Q|8|@]|9|@]|C|$]]]|11|$12|$5|13|14|15|C|$16|17]]|18|$5|13|14|15|C|$16|17]]]]

Put all parameters in HiddenField's, one of the HDF must be a flag that is used to decide if the select method must return the query items. See this <a href="https://dl.dropbox.com/u/49510149/stackoverflow/dotnet/Q11874496WebApp.7z" rel="nofollow">answer</a>.

Code sample:

FilterGridView.aspx:

<pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeBehind="FilterGridView.aspx.cs"
 Inherits="Q11876988WebApp.FilterGridView" %&gt;

&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;
&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
&lt;head runat="server"&gt;
 &lt;title&gt;&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
 &lt;form id="form1" runat="server"&gt;
 &lt;div&gt;
 &lt;%--
 Fields for user inputs
 --%&gt;
 &amp;nbsp;Id:
 &lt;asp:TextBox ID="TxtId" runat="server"&gt;&lt;/asp:TextBox&gt;
 &amp;nbsp;Name:
 &lt;asp:TextBox ID="TxtName" runat="server"&gt;&lt;/asp:TextBox&gt;
 &amp;nbsp;Phone:
 &lt;asp:TextBox ID="TxtPhone" runat="server"&gt;&lt;/asp:TextBox&gt;
 &lt;%--
 Button to perform query
 --%&gt;
 &lt;asp:Button ID="BtnQuery" runat="server" OnClick="BtnQuery_Click" Text="Query" /&gt;
 &lt;%--
 Hidden Fields used as parameters
 --%&gt;
 &lt;asp:HiddenField ID="HdfId" runat="server" /&gt;
 &lt;asp:HiddenField ID="HdfName" runat="server" /&gt;
 &lt;asp:HiddenField ID="HdfPhone" runat="server" /&gt;
 &lt;%--'false': Avoid query execution before 'BtnQuery' click.--%&gt;
 &lt;asp:HiddenField ID="HdfDoQuery" runat="server" Value="false" /&gt;
 &lt;%--
 GridView
 --%&gt;
 &lt;asp:GridView ID="GrvMyData" runat="server" AutoGenerateColumns="False" DataSourceID="OdsMyData"&gt;
 &lt;Columns&gt;
 &lt;asp:BoundField DataField="Id" HeaderText="Id" SortExpression="Id" /&gt;
 &lt;asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" /&gt;
 &lt;asp:BoundField DataField="Phone" HeaderText="Phone" SortExpression="Phone" /&gt;
 &lt;/Columns&gt;
 &lt;/asp:GridView&gt;
 &lt;%--
 ObjectDataSource and parameters related to Hidden Fields
 --%&gt;
 &lt;asp:ObjectDataSource ID="OdsMyData" runat="server" OldValuesParameterFormatString="original_{0}"
 SelectMethod="QueryMyDataPoco" TypeName="Q11876988WebApp.FilterGridViewODS"&gt;
 &lt;SelectParameters&gt;
 &lt;asp:ControlParameter ControlID="HdfId" ConvertEmptyStringToNull="False" Name="id"
 PropertyName="Value" Type="String" /&gt;
 &lt;asp:ControlParameter ControlID="HdfName" ConvertEmptyStringToNull="False" Name="name"
 PropertyName="Value" Type="String" /&gt;
 &lt;asp:ControlParameter ControlID="HdfPhone" ConvertEmptyStringToNull="False" Name="phone"
 PropertyName="Value" Type="String" /&gt;
 &lt;asp:ControlParameter ControlID="HdfDoQuery" ConvertEmptyStringToNull="False" Name="doQuery"
 PropertyName="Value" Type="Boolean" /&gt;
 &lt;/SelectParameters&gt;
 &lt;/asp:ObjectDataSource&gt;
 &lt;/div&gt;
 &lt;/form&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>

FilterGridView.aspx.cs:

<pre><code>public partial class FilterGridView : System.Web.UI.Page
{
 protected void Page_Load(object sender, EventArgs e)
 {
 }


 protected void BtnQuery_Click(object sender, EventArgs e)
 {
 //change this values causes the 'OdsMyData' 'DataBind'.
 this.HdfId.Value = this.TxtId.Text;
 this.HdfName.Value = this.TxtName.Text;
 this.HdfPhone.Value = this.TxtPhone.Text;
 this.HdfDoQuery.Value = true.ToString();
 }
}
</code></pre>

FilterGridViewODS.cs:

<pre><code>/// &lt;summary&gt;
/// Class for a ObjectDataSource
/// &lt;/summary&gt;
[DataObject]
public class FilterGridViewODS
{
 private static IList&lt;MyDataPoco&gt; MyDataList = new List&lt;MyDataPoco&gt;();

 /// &lt;summary&gt;
 /// Static constructor. Creates a list of 50 items.
 /// &lt;/summary&gt;
 static FilterGridViewODS()
 {
 for (int i = 0; i &lt; 50; i++)
 {
 MyDataList.Add(
 new MyDataPoco()
 {
 Id = i.ToString(),
 Name = "Name " + i,
 Phone = i + "" + i + "" + i + "." + i + "" + i + "" + i + "" + i + ""
 });
 }
 }

 /// &lt;summary&gt;
 /// if &lt;paramref name="doQuery"/&gt; is &lt;c&gt;true&lt;/c&gt;, performs a 
 /// query over the data content, Otherwise return an empty list.
 /// &lt;/summary&gt;
 [DataObjectMethod(DataObjectMethodType.Select)]
 public IEnumerable&lt;MyDataPoco&gt; QueryMyDataPoco(String id, String name, String phone, bool doQuery)
 {
 if (doQuery)
 {
 IEnumerable&lt;MyDataPoco&gt; filteredEnum =
 from md in MyDataList
 where
 md.Id.Contains(id)
 &amp;&amp; md.Name.Contains(name)
 &amp;&amp; md.Phone.Contains(phone)
 select md;

 return filteredEnum;
 }
 else
 {
 //returning an empty list.
 return new List&lt;MyDataPoco&gt;();
 }
 }
}
</code></pre>

MyDataPoco.cs:

<pre><code>public class MyDataPoco
{
 public String Id { get; set; }
 public String Name { get; set; }
 public String Phone { get; set; }
}
</code></pre>

Complete source: <a href="https://dl.dropbox.com/u/49510149/stackoverflow/dotnet/Q11874496WebApp.7z" rel="nofollow">Q11874496WebApp.7z</a>

blocks|key|311247|text|我假设您已经为ObjectDataSource控件中的每个参数值指定了来源。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|311248|您需要做的是在搜索按钮的单击事件上指定数据源，并显式绑定网格，如下所示：|311249|gridView1.DataSource+=+objectDataSource1;
gridView1.DataBind();|code-block|syntax|javascript|311250|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I'm assuming you've already specified which source for each parameter value in the ObjectDataSource control.

What you need to do is on the search button's click event specify the data source and explicitly bind the grid as follows:

<pre><code>gridView1.DataSource = objectDataSource1;
gridView1.DataBind();
</code></pre>

I have a question for you all, how can I make an object data source load data in to the gridview only when somebody clicks a link button? The main thing I am going to pass some parameters for the select method in the object data source at run time based on the search criteria of the user. Can anyone suggest a solution for this?

gridview loading of data using object data source control

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个问题要问大家，如何让对象数据源仅在有人单击链接按钮时才将数据加载到网格视图中？主要的事情是，我将根据用户的搜索条件，在运行时为对象数据源中的select方法传递一些参数。有没有人能给出一个解决方案？

问使用对象数据源控件加载数据的网格视图
EN

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问使用对象数据源控件加载数据的网格视图EN