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[英]Problems making LinkButton visible in certain rows only within a GridView
[英]After Edit Linkbutton is pressed only certain columns can be Updated with the rest set to null
當您選擇“編輯”按鈕時,前兩列:idt和datetime允許您更新。
(只要主鍵是唯一的)
無論您在單擊“更新”之前輸入什么,后三列:col1,col2和col3都為空。
這是輸入“更新”后的錯誤代碼:
System.FormatException: Input string was not in a correct format.
這是我的代碼:
<asp:GridView ID="GridView1"
runat="server"
DataSourceID="SqlDataSource1"
AutoGenerateColumns="false"
DataKeyNames="idt"
AutoGenerateEditButton="true"
AutoGenerateDeleteButton="true"
showfooter="true">
<Columns>
<asp:BoundField DataField="idt" HeaderText="idt" Readonly="true" SortExpression="idt" />
<asp:BoundField DataField="datetime" HeaderText="datetime" SortExpression="datetime" />
<asp:TemplateField SortExpression="col1" HeaderText="col1">
<ItemTemplate>
<asp:TextBox ID="txt1" runat="server" Text='<%# Eval("col1") %>' />
</ItemTemplate>
<EditItemTemplate>
<asp:textbox id="col1TextBox" text='<%#Eval("col1")%>' runat="server" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField SortExpression="col2" HeaderText="col2">
<ItemTemplate>
<asp:TextBox ID="txt2" runat="server" Text='<%# Eval("col2") %>' />
</ItemTemplate>
<EditItemTemplate>
<asp:textbox id="col2TextBox" text='<%#Eval("col2")%>' runat="server" />
</EditItemTemplate>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField SortExpression="col3" HeaderText="col3">
<ItemTemplate>
<asp:TextBox ID="txt3" runat="server" Text='<%# Eval("col3") %>' />
</ItemTemplate>
<EditItemTemplate>
<asp:textbox id="col3TextBox" text='<%#Eval("col3")%>' runat="server" />
</EditItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource
id="SqlDataSource1"
ConnectionString="<%$ ConnectionStrings:Total %>"
SelectCommand="SELECT * FROM [test];"
UpdateCommand="UPDATE [test] SET [datetime] = @datetime, [col1] = @col1, [col2] = @col2, [col3] = @col3 WHERE [idt] = @idt;"
DeleteCommand="DELETE FROM [test] WHERE [idt] = @idt;"
runat="server">
<DeleteParameters>
<asp:Parameter Name="idt" Type="Int32" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="idt" Type="Int32" />
<asp:Parameter Name="datetime" Type="String" />
<asp:Parameter Name="col1" Type="Int32" />
<asp:Parameter Name="col2" Type="Int32" />
<asp:Parameter Name="col3" Type="Int32" />
</UpdateParameters> </asp:SqlDataSource>
我認為應該使用Bind代替Eval。 As Bind用於兩種方式的數據綁定,在您要編輯或插入時使用。
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