C# GridView 控件绑定下拉列表框及给下拉列表框设定默认值

aspx文件内容

<form id="form1" runat="server" onsubmit="">

<div style="margin: 100px auto; width: 80%; text-align: left">

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"

OnRowDataBound="GridView1_RowDataBound" OnRowEditing="GridView1_RowUpdating"

OnRowUpdated="GridView1_RowUpdated" AutoGenerateColumns="False" DataKeyNames="pkID"

DataSourceID="SqlDataSource1" PageSize="200" Width="100%" BackColor="White" BorderColor="White" BorderStyle="Ridge" BorderWidth="2px" CellPadding="3" CellSpacing="1" GridLines="None">

<Columns>

<asp:BoundField DataField="pkID" HeaderText="pkID" InsertVisible="False" ReadOnly="True"

SortExpression="pkID" />

<asp:BoundField DataField="infoType" HeaderText="infoType" InsertVisible="False" ReadOnly="True"

SortExpression="infoType" />

<asp:BoundField DataField="title" HeaderText="标题" SortExpression="title" /><asp:BoundField DataField="webType" HeaderText="网站类型" SortExpression="webType" /><asp:BoundField DataField="remarkType" HeaderText="正负面评价" SortExpression="remarkType" /><asp:BoundField DataField="score" HeaderText="正负面评分" SortExpression="score" /><asp:BoundField DataField="pubTime" HeaderText="日期开始" SortExpression="pubTime" /><asp:BoundField DataField="endTime" HeaderText="日期结束" SortExpression="endTime" /><asp:BoundField DataField="replycount" HeaderText="相关文章数" SortExpression="replycount" />

<asp:BoundField DataField="link" HeaderText="链接" SortExpression="link" />

<asp:BoundField DataField="editor" HeaderText="编辑者" SortExpression="editor" />

<asp:TemplateField HeaderText="分类" >

<ItemTemplate>

<asp:DropDownList ID="ddlInfoType" runat="server" DataSourceID="SqlDataSource1" DataTextField="t_name"

DataValueField="pkid" >

</asp:DropDownList><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"

SelectCommand="SELECT [t_name], [pkid] FROM [t_info_type]"></asp:SqlDataSource>

</ItemTemplate>

</asp:TemplateField>

</Columns>

<FooterStyle BackColor="#C6C3C6" ForeColor="Black" />

<RowStyle BackColor="#DEDFDE" ForeColor="Black" />

<PagerStyle BackColor="#C6C3C6" ForeColor="Black" HorizontalAlign="Right" />

<SelectedRowStyle BackColor="#9471DE" Font-Bold="True" ForeColor="White" />

<HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#E7E7FF" />

</asp:GridView>

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"

DeleteCommand="" InsertCommand="" SelectCommand="" UpdateCommand="">

<DeleteParameters>

<asp:Parameter Name="pkID" Type="Int32" />

</DeleteParameters>

</asp:SqlDataSource>

</div>

</form>

.cs文件代码

//红色字体部分用来设定下拉列表框默认值

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

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

{

DataRowView drv = e.Row.DataItem as DataRowView;

int rid = Convert.ToInt32(((DataRowView)e.Row.DataItem)["infoType"]);

int Pkid = Convert.ToInt32(((DataRowView)e.Row.DataItem)["pkID"]);

string strLink = Convert.ToString(((DataRowView)e.Row.DataItem)["link"]);

((DataRowView)e.Row.DataItem).Row["title"] = "dddddd";

e.Row.Cells[2].Text =" <a href='http://blog.my400800.cn' target=\"_blank\">"+ e.Row.Cells[2].Text+"</a>";

DropDownList dd = (DropDownList)e.Row.FindControl("ddlInfoType");

// DataTable table = dd.DataSource as DataTable;

dd.SelectedValue = rid.ToString();

dd.Attributes.Add("onchange", "ajaxUpdateInfoType('" + Pkid + "',this);");

}

}