باسلام:
برای سوال اول باید از رویداد SelectedIndexChanged استفاده کنید:
<%@ Page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void CustomersGridView_SelectedIndexChanged(Object sender, EventArgs e)
{
// Get the currently selected row using the SelectedRow property.
GridViewRow row = CustomersGridView.SelectedRow;
// Display the company name from the selected row.
// In this example, the third column (index 2) contains
// the company name.
MessageLabel.Text = "You selected " + row.Cells[2].Text + ".";
}
void CustomersGridView_SelectedIndexChanging(Object sender, GridViewSelectEventArgs e)
{
// Get the currently selected row. Because the SelectedIndexChanging event
// occurs before the select operation in the GridView control, the
// SelectedRow property cannot be used. Instead, use the Rows collection
// and the NewSelectedIndex property of the e argument passed to this
// event handler.
GridViewRow row = CustomersGridView.Rows[e.NewSelectedIndex];
// You can cancel the select operation by using the Cancel
// property. For this example, if the user selects a customer with
// the ID "ANATR", the select operation is canceled and an error message
// is displayed.
if (row.Cells[1].Text == "ANATR")
{
e.Cancel = true;
MessageLabel.Text = "You cannot select " + row.Cells[2].Text + ".";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView Select Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView Select Example</h3>
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSource"
autogeneratecolumns="False"
autogenerateselectbutton="True"
allowpaging="True"
selectedindex="1"
onselectedindexchanged="CustomersGridView_SelectedIndexChanged"
onselectedindexchanging="CustomersGridView_SelectedIndexChanging"
runat="server" DataKeyNames="CustomerID">
<Columns>
<asp:BoundField DataField="CustomerID"
HeaderText="CustomerID"
InsertVisible="False" ReadOnly="True"
SortExpression="CustomerID" />
<asp:BoundField DataField="FirstName"
HeaderText="FirstName"
SortExpression="FirstName" />
<asp:BoundField DataField="MiddleName"
HeaderText="MiddleName"
SortExpression="MiddleName" />
<asp:BoundField DataField="LastName"
HeaderText="LastName"
SortExpression="LastName" />
<asp:BoundField DataField="Phone"
HeaderText="Phone"
SortExpression="Phone" />
</Columns>
<selectedrowstyle backcolor="LightCyan"
forecolor="DarkBlue"
font-bold="true"/>
</asp:gridview>
<br/>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="CustomersSource"
selectcommand="SELECT CustomerID, FirstName, MiddleName, LastName, Phone FROM SalesLT.Customer"
connectionstring="<%$ ConnectionStrings:AdventureWorksLTConnectionString %>"
runat="server"/>
</form>
</body>
</html>
برای سوال دوم هم از حالت TemplateField برای ایجاد ستون dropdownlist استفاده کن:
مثال:
<asp:GridView ID="GridView1" Runat="server"
DataSourceID="employeeDataSource" AutoGenerateColumns="False"
BorderWidth="1px" BackColor="White" GridLines="Vertical"
CellPadding="4" BorderStyle="None"
BorderColor="#DEDFDE" ForeColor="Black">
<FooterStyle BackColor="#CCCC99"></FooterStyle>
<PagerStyle ForeColor="Black" HorizontalAlign="Right"
BackColor="#F7F7DE"></PagerStyle>
<HeaderStyle ForeColor="White" Font-Bold="True"
BackColor="#6B696B"></HeaderStyle>
<AlternatingRowStyle BackColor="White"></AlternatingRowStyle>
<Columns>
<asp:BoundField HeaderText="Last" DataField="LastName"
SortExpression="LastName"></asp:BoundField>
<asp:BoundField HeaderText="First" DataField="FirstName"
SortExpression="FirstName"></asp:BoundField>
<asp:BoundField HeaderText="Hire Date" DataField="HireDate"
SortExpression="HireDate"
DataFormatString="{0:d}"></asp:BoundField>
<asp:TemplateField HeaderText="Seniority">
<ItemTemplate>
<%# ComputeSeniorityLevel(DateTime.Now –
(DateTime)Eval("HireDate")) %>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<SelectedRowStyle ForeColor="White" Font-Bold="True"
BackColor="#CE5D5A"></SelectedRowStyle>
<RowStyle BackColor="#F7F7DE"></RowStyle>
</asp:GridView>