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我想異步更新面板（panel1和panel2）。然而，當頁面加載時，如果我嘗試編輯一行並更新它，panel1的RequiredFieldValidator會給出一個錯誤消息*並且行的更新鏈接不起作用！從panel1添加公司後，更新鏈接開始工作。我如何解決這個問題？異步更新面板_
<asp:UpdatePanel ID="updatepanel1" runat="server" UpdateMode="Conditional" >
<ContentTemplate>
<div id="div1">
<table>
<tr>
<td><b>Company Name</b></td>
<td>
<asp:TextBox ID="company" runat="server" ></asp:TextBox>
</td>
<td>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="company" ErrorMessage="*"
Display="Dynamic" ></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td></td>
<td>
<asp:Button ID="submitbut" runat="server" Text="Submit" onclick="submit_Click" />
</td>
</tr>
</table>
</div>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="submitbut" EventName="Click"/>
</Triggers>
</asp:UpdatePanel>
<asp:UpdatePanel ID="updatepanel2" runat="server" UpdateMode="Always" >
<ContentTemplate>
<div id="div3">
<asp:GridView ID="grid1" runat="server" DataSourceID="sqlSource1" DataKeyNames="id"
AutoGenerateColumns="false"
BackColor="White" BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px"
CellPadding="3" ForeColor="Black" GridLines="Vertical">
<Columns>
<asp:CommandField ShowSelectButton="true" ButtonType="Image" SelectImageUrl="~/Images/select.gif" />
<asp:CommandField ShowDeleteButton="true" ButtonType="Image" DeleteImageUrl="~/Images/delete.gif" />
<asp:CommandField ShowEditButton="true" ButtonType="Image" EditImageUrl="~/Images/edit.gif" UpdateImageUrl="~/Images/update.png" CancelImageUrl="~/Images/delete.gif" />
<asp:BoundField DataField="id" HeaderText="Company ID" />
<asp:BoundField DataField="name" HeaderText="Company Name" />
</Columns>
<FooterStyle BackColor="#CCCCCC" />
<PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#000099" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="Black" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="#CCCCCC" />
</asp:GridView>
<asp:SqlDataSource ID="sqlSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:BTConnectionString %>"
ProviderName="System.Data.SqlClient"
SelectCommand="SELECT * FROM Company"
UpdateCommand="UPDATE Company SET name = @name WHERE (id = @id)"
DeleteCommand="DELETE FROM Company WHERE (id = @id)" >
<UpdateParameters>
<asp:Parameter Name="name" Type="String" />
<asp:Parameter Name="id" Type="Int32" />
</UpdateParameters>
<DeleteParameters>
<asp:Parameter Name="id" Type="Int32" />
</DeleteParameters>
</asp:SqlDataSource>
</div>
</ContentTemplate>
</asp:UpdatePanel>
protected void Page_Load(object sender, EventArgs e)
{
}
protected bool IsatDatabase(string companyName)
{
SqlApplication con = new SqlApplication();
Int32 count = 0;
try
{
SqlCommand cmd = new SqlCommand("SELECT COUNT(*) FROM BT.dbo.Company WHERE (name = @com)",
con.GetConnection());
cmd.Parameters.AddWithValue("@com", companyName);
con.OpenSqlConnection();
count = (Int32)cmd.ExecuteScalar();
if (count == 0)
{
return false;
}
else
{
return true;
}
}
catch (Exception err)
{
System.Diagnostics.Debug.WriteLine("Exception: " + err.Message);
return true;
}
finally
{
con.CloseSqlConnection();
}
}
protected void submit_Click(object sender, EventArgs e)
{
SqlApplication con = new SqlApplication();
try
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = con.GetConnection();
cmd.CommandText = "INSERT INTO BT.dbo.Company VALUES (@com)";
cmd.Parameters.AddWithValue("@com", company.Text);
con.OpenSqlConnection();
if (!IsatDatabase(company.Text))
{
SqlDataReader reader = cmd.ExecuteReader();
reader.Close();
grid1.DataBind();
}
}
catch (Exception err)
{
System.Diagnostics.Debug.WriteLine("Exception: " + err.Message);
}
finally
{
con.CloseSqlConnection();
}
}
}