本文介绍了如何找到所选指标改变属性的GridView的datakey价值？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的GridView是这样的，但我得到的错误，当我选择视图按钮选择指数变更为找到主键值列。请帮我解决这个问题。
＆LT; ASP：GridView控件ID =GridView1=服务器的AutoGenerateColumns =FALSE的cellpadding =4前景色=＃333333网格=无OnSelectedIndexChanged = GridView1_SelectedIndexChanged＆GT;
＆LT;柱体和GT;
＆LT; ASP：的TemplateField＆GT;
＆LT;＆ItemTemplate中GT;
＆LT; ASP：按钮的ID =btnViewComments文本=查看评论=服务器的CommandName =选择/＆GT;
＆LT; / ItemTemplate中＆GT;
＆LT; / ASP：的TemplateField＆GT;
＆LT; ASP：BoundField的数据字段=forumId可见=假/＆GT;
＆LT;％ - ＆LT; ASP：CommandField中按钮类型=按钮ShowSelectButton =真SelectText =查看评论/＆GT; - ％GT;
＆LT; ASP：的TemplateField的HeaderText =问题＆GT;
＆LT;＆ItemTemplate中GT;
＆LT; ASP：文本框ID =txtQuestion文本='＆LT;％＃的eval（问题）％＆GT;' =服务器的TextMode =多行HEIGHT =100WIDTH =350＆GT;＆LT; / ASP：文本框＆GT;
＆LT;％ - ＆LT;％＃的eval（问题）％＆GT; - ％GT;
＆LT; / ItemTemplate中＆GT;
＆LT;％ - ＆LT;＆EditItemTemplate的GT;
＆LT; ASP：文本框ID =txtQuestion文本='＆LT;％＃的eval（问题）％＆GT;' =服务器的TextMode =多行＆GT;＆LT; / ASP：文本框＆GT;
＆LT; / EditItemTemplate中＆GT; - ％GT;
＆LT; / ASP：的TemplateField＆GT;
＆LT; ASP：的TemplateField的HeaderText =海报名称＆GT;
＆LT;＆ItemTemplate中GT;
＆LT;％＃的eval（posterName）％＆GT;
＆LT; / ItemTemplate中＆GT;
＆LT;＆EditItemTemplate的GT;
＆LT; ASP：标签ID =lblPosterName文本='＆LT;％＃的eval（posterName）％＆GT;' =服务器＆GT;＆LT; / ASP：标签＆gt;
＆LT; / EditItemTemplate中＆GT;
＆LT; / ASP：的TemplateField＆GT;
＆LT; ASP：的TemplateField的HeaderText =日期＆GT;
＆LT;＆ItemTemplate中GT;
＆LT;％＃的eval（dateTim）％＆GT;
＆LT; / ItemTemplate中＆GT;
＆LT;＆EditItemTemplate的GT;
＆LT; ASP：标签ID =lblDateTime文本='＆LT;％＃的eval（dateTim）％＆GT;' =服务器＆GT;＆LT; / ASP：标签＆gt;
＆LT; / EditItemTemplate中＆GT;
＆LT; / ASP：的TemplateField＆GT;
＆LT; /专栏＆GT;
＆LT; RowStyle的BackColor =＃F7F6F3前景色=＃333333/＆GT;
＆LT; FooterStyle背景色=＃5D7B9DFONT-粗体=真前景色=白/＆GT;
＆LT; PagerStyle背景色=＃284775前景色=白HorizontalAlign =中心/＆GT;
＆LT; SelectedRowStyle背景色=＃E2DED6FONT-粗体=真前景色=＃333333/＆GT;
＆LT; HeaderStyle背景色=＃5D7B9DFONT-粗体=真前景色=白/＆GT;
＆LT; EditRowStyle背景色=＃999999/＆GT;
＆LT; AlternatingRowStyle背景色=白前景色=＃284775/＆GT;
＆LT; / ASP：GridView的＆GT;
我的code是.....
保护无效GridView1_SelectedIndexChanged（对象发件人，EventArgs的发送）
{
尝试
{
Int64的forumId =（Int64的）GridView1.SelectedValue;
会话[forumId] = forumId;
的Response.Redirect（Thread.aspx）;
}
赶上（例外）
{ 扔;
}
}
解决方案
首先，你必须在网格视图声明来定义字段名你想datakey的哪个字段。例如，如果你想forumIddatakey.than
＆LT; ASP：GridView控件ID =GridView1=服务器的AutoGenerateColumns =FALSE的cellpadding =4前景色=＃333333网格=无OnSelectedIndexChanged = GridView1_SelectedIndexChanged
的DataKeyNames =forumId＆GT;
和比你可以以这种方式访问
INT intforumid = Convert.ToInt32（GridView1.DataKeys [row.RowIndex] .Values [0]）;
My gridview is like this but I am getting error when I select view button to find primary key value column on selected index changed. Please help me to solve the issue.
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
<Columns >
<asp:TemplateField >
<ItemTemplate >
<asp:Button ID="btnViewComments" Text ="View Comments" runat ="server" CommandName ="select" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField ="forumId" Visible ="false" />
<%--<asp:CommandField ButtonType ="Button" ShowSelectButton ="true" SelectText ="View Comments"/>--%>
<asp:TemplateField HeaderText ="Question">
<ItemTemplate >
<asp:TextBox ID ="txtQuestion" Text ='<%#Eval("question")%>' runat ="server" TextMode ="MultiLine" Height="100" Width ="350"></asp:TextBox>
<%-- <%#Eval("question")%>--%>
</ItemTemplate>
<%--<EditItemTemplate >
<asp:TextBox ID ="txtQuestion" Text ='<%#Eval("question")%>' runat ="server" TextMode ="MultiLine" ></asp:TextBox>
</EditItemTemplate>--%>
</asp:TemplateField>
<asp:TemplateField HeaderText="Poster Name">
<ItemTemplate >
<%#Eval("posterName") %>
</ItemTemplate>
<EditItemTemplate >
<asp:Label ID ="lblPosterName" Text ='<%#Eval("posterName") %>' runat ="server" ></asp:Label>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Date">
<ItemTemplate >
<%#Eval("dateTim") %>
</ItemTemplate>
<EditItemTemplate >
<asp:Label ID ="lblDateTime" Text ='<%#Eval("dateTim") %>' runat ="server" ></asp:Label>
</EditItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
my code is.....
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
Int64 forumId = (Int64)GridView1.SelectedValue;
Session["forumId"] = forumId;
Response.Redirect("Thread.aspx");
}
catch (Exception)
{
throw;
}
}
解决方案
First you have to define field name in grid view declaration that which field you want to make datakey. for example if you want "forumId" datakey.than
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" OnSelectedIndexChanged="GridView1_SelectedIndexChanged"
DataKeyNames="forumId">
and than you can access in this way
int intforumid = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Values[0]);
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