问：
我的aspx：
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
<br />
<h1>
MANAGE ADS</h1>
<br />
<br />
<p>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"
CellPadding="4" DataKeyNames="postid" ForeColor="#333333" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<Columns>
<asp:CommandField ShowEditButton="True" ShowSelectButton="True" />
<asp:BoundField DataField="userid" HeaderText="userid" SortExpression="userid" ReadOnly="True" />
<asp:BoundField DataField="title" HeaderText="title" SortExpression="title" ReadOnly="True" />
<asp:BoundField DataField="ad_description" HeaderText="ad_description" SortExpression="ad_description"
ReadOnly="True" />
<asp:BoundField DataField="status_post" HeaderText="status_post" SortExpression="status_post" />
<asp:BoundField DataField="postid" HeaderText="postid" InsertVisible="False" ReadOnly="True"
SortExpression="postid" />
<asp:BoundField DataField="date_creation" HeaderText="date_creation" SortExpression="date_creation"
ReadOnly="True" />
</Columns>
<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>
<br />
<asp:Button ID="Button1" runat="server" Text="Do you want to Delete" OnClick="Button1_Click" />
<asp:Label ID="Label3" runat="server" Text="Label" Visible="False"></asp:Label>
<br />
<asp:Panel ID="Panel1" runat="server" Visible="False">
<asp:Label ID="Label1" runat="server" Text="you have selected :"></asp:Label>
<asp:Label ID="Label2" runat="server" Text="Label" Visible="false"></asp:Label>
<asp:Button ID="Button2" runat="server" Text="Delete" Height="29px" OnClick="Button2_Click" />
<asp:Button ID="Button3" runat="server" Text="Cancel" />
</asp:Panel>
<p>
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConflictDetection="CompareAllValues"
ConnectionString="<%$ ConnectionStrings:eclassConnectionString %>" DeleteCommand="DELETE FROM [postad] WHERE [postid] = @original_postid AND (([userid] = @original_userid) OR ([userid] IS NULL AND @original_userid IS NULL)) AND [title] = @original_title AND [ad_description] = @original_ad_description AND [status_post] = @original_status_post AND [date_creation] = @original_date_creation"
InsertCommand="INSERT INTO [postad] ([userid], [title], [ad_description], [status_post], [date_creation]) VALUES (@userid, @title, @ad_description, @status_post, @date_creation)"
OldValuesParameterFormatString="original_{0}" OnSelecting="SqlDataSource1_Selecting1"
SelectCommand="SELECT [userid], [title], [ad_description], [status_post], [postid], [date_creation] FROM [postad]"
UpdateCommand="UPDATE [postad] SET [status_post] = @status_post WHERE [status_post] = @original_status_post and [postid]=@original_postid">
<DeleteParameters>
<asp:Parameter Name="original_postid" Type="Int32" />
<asp:Parameter Name="original_userid" Type="String" />
<asp:Parameter Name="original_title" Type="String" />
<asp:Parameter Name="original_ad_description" Type="String" />
<asp:Parameter Name="original_status_post" Type="String" />
<asp:Parameter DbType="Date" Name="original_date_creation" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="userid" Type="String" />
<asp:Parameter Name="title" Type="String" />
<asp:Parameter Name="ad_description" Type="String" />
<asp:Parameter Name="status_post" Type="String" />
<asp:Parameter DbType="DateTime" Name="date_creation" />
<asp:Parameter Name="original_postid" Type="Int32" />
<asp:Parameter Name="original_userid" Type="String" />
<asp:Parameter Name="original_title" Type="String" />
<asp:Parameter Name="original_ad_description" Type="String" />
<asp:Parameter Name="original_status_post" Type="String" />
<asp:Parameter DbType="DateTime" Name="original_date_creation" />
</UpdateParameters>
<InsertParameters>
<asp:Parameter Name="userid" Type="String" />
<asp:Parameter Name="title" Type="String" />
<asp:Parameter Name="ad_description" Type="String" />
<asp:Parameter Name="status_post" Type="String" />
<asp:Parameter DbType="DateTime" Name="date_creation" />
</InsertParameters>
</asp:SqlDataSource>
</asp:Content>
和我的.cs代码：
public partial class adminMaintainUserAds : System.Web.UI.Page
{
int id = 0;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void SqlDataSource1_Selecting1(object sender, SqlDataSourceSelectingEventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Panel1.Visible = true;
Label2.Text = id.ToString();
Label2.Visible = true;
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow r = GridView1.SelectedRow;
getting error here... id =Convert.toint32Int32(r.Cells[4].Text);
// int id1 = Convert.ToInt32(id);
//Session["grid"] = id1;
}
protected void Button2_Click(object sender, EventArgs e)
{
string query = "update postad set status_post=@del where postid=@post";
SqlConnection myConnection = new SqlConnection("Data Source=DELL-PC\\SQLEXPRESS;Initial Catalog=eclass;Persist Security Info=True;integrated security = true");
myConnection.Open();
SqlCommand q1 = new SqlCommand(query,myConnection);
q1.Parameters.AddWithValue("@del", "delete");
q1.Parameters.AddWithValue("@post",id);
try
{
int i = Convert.ToInt32(q1.ExecuteNonQuery());
if (i > 0)
{
Panel1.Visible = false;
Label3.Text = "Deleted";
Label3.Visible = true;
myConnection.Close();
}
}
catch (Exception ae)
{
Label3.Text = "Error";
}
}
}
如何从gridview中提取值并将其用作整数，因为我必须根据数据库中的此值进行检查。
答案 0 :(得分：0)
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
try
{
int index = Convert.ToInt32(e.CommandArgument);//Get the index
if (e.CommandName == "Select_ad")
{
int id =int.Parse(GridView1.Rows[index].Cells[4].Text);
//your code
}
}
catch (Exception ee)
{
string message = ee.Message;
}
}
注意：1-在aspx中：
CommandArgument='<%#((GridViewRow)Container).RowIndex%>' CommandName = "Select_ad"
表示gridview中的button。
您无需复制所有代码。