C# 使用gridview中的下拉列表更新SQL Server数据库表
我有一个带有几个文本框和网格视图的web表单。输入id号后，网格视图将显示SQLdatasource中的特定数据。理论上，网格视图中的信息可以通过下拉列表删除或编辑。问题在于，当在下拉列表中进行选择并单击“更新”按钮时，栅格视图将刷新为原始选择 我已经研究过我可能会做错什么，但我想我已经看了这么久了，我只是在转动我的轮子。我有一种感觉，这可能是由于在C代码中反复尝试而产生的一些格式错误，也可能是我没有的东西。我想另一双眼睛也不会受伤 谢谢 这是我的HTML：C# 使用gridview中的下拉列表更新SQL Server数据库表,c#,sql-server,gridview,visual-studio-2012,C#,Sql Server,Gridview,Visual Studio 2012,我有一个带有几个文本框和网格视图的web表单。输入id号后，网格视图将显示SQLdatasource中的特定数据。理论上，网格视图中的信息可以通过下拉列表删除或编辑。问题在于，当在下拉列表中进行选择并单击“更新”按钮时，栅格视图将刷新为原始选择 我已经研究过我可能会做错什么，但我想我已经看了这么久了，我只是在转动我的轮子。我有一种感觉，这可能是由于在C代码中反复尝试而产生的一些格式错误，也可能是我没有的东西。我想另一双眼睛也不会受伤 谢谢 这是我的HTML： <html xmlns
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<link href="../Styles/Styles.css" rel="stylesheet" />
<style type="text/css">
.auto-style1 {
width: 50%;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div class="main outside">
<div class="user">
<table class="auto-style1">
<tr>
<td>
<asp:Label ID="lblName" runat="server" Text="Name: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblEmail" runat="server" Text="Email:"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblUserName" runat="server" Text="User Name:"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtUserName" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
</td>
<td>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblTest" runat="server" Text="Test User ID:"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtTest" runat="server"></asp:TextBox>
</td>
</tr>
</table>
</div>
<div class="baby">
<asp:GridView ID="grdvwBabyInfo" runat="server" AutoGenerateColumns="False"
DataKeyNames="id_baby" DataSourceID="SqlDataSource1">
<Columns>
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
<asp:BoundField DataField="id_baby" HeaderText="id_baby" InsertVisible="False"
ReadOnly="True" SortExpression="id_baby" Visible="False" />
<asp:BoundField DataField="id_user" HeaderText="id_user"
SortExpression="id_user" Visible="False" />
<asp:TemplateField HeaderText="Your Relation" SortExpression="relation_to_baby">
<EditItemTemplate>
<asp:DropDownList ID="drpDwnRelation" runat="server"
SelectedValue='<%# Bind("relation_to_baby") %>' AutoPostBack="False">
<asp:ListItem>mother</asp:ListItem>
<asp:ListItem>father</asp:ListItem>
<asp:ListItem>brother</asp:ListItem>
<asp:ListItem>sister</asp:ListItem>
<asp:ListItem>aunt</asp:ListItem>
<asp:ListItem>uncle</asp:ListItem>
<asp:ListItem>grandmother</asp:ListItem>
<asp:ListItem>grandfather</asp:ListItem>
<asp:ListItem>niece</asp:ListItem>
<asp:ListItem>nephew</asp:ListItem>
<asp:ListItem>friend</asp:ListItem>
<asp:ListItem>other</asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("relation_to_baby") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Baby's Gender" SortExpression="sex_of_baby">
<EditItemTemplate>
<asp:DropDownList ID="drpDwnGender" runat="server"
SelectedValue='<%# Bind("sex_of_baby") %>' AutoPostBack="False">
<asp:ListItem>a baby boy</asp:ListItem>
<asp:ListItem>a baby girl</asp:ListItem>
<asp:ListItem>twins</asp:ListItem>
<asp:ListItem>triplets</asp:ListItem>
<asp:ListItem>unknown</asp:ListItem>
<asp:ListItem>other</asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("sex_of_baby") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Est. Due Date" SortExpression="due_date">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("due_date") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="baby_first_name" HeaderText="Baby's First Name"
SortExpression="baby_first_name" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConflictDetection="CompareAllValues" ConnectionString="<%$ ConnectionStrings:bbvs_d01ConnectionString %>" DeleteCommand="DELETE FROM [bbuser_baby] WHERE [id_baby] = @original_id_baby AND [id_user] = @original_id_user AND [relation_to_baby] = @original_relation_to_baby AND [sex_of_baby] = @original_sex_of_baby AND (([due_date] = @original_due_date) OR ([due_date] IS NULL AND @original_due_date IS NULL)) AND (([baby_first_name] = @original_baby_first_name) OR ([baby_first_name] IS NULL AND @original_baby_first_name IS NULL))" InsertCommand="INSERT INTO [bbuser_baby] ([id_user], [relation_to_baby], [sex_of_baby], [due_date], [baby_first_name]) VALUES (@id_user, @relation_to_baby, @sex_of_baby, @due_date, @baby_first_name)" OldValuesParameterFormatString="original_{0}" SelectCommand="SELECT * FROM [bbuser_baby] WHERE ([id_user] = @id_user)" UpdateCommand="UPDATE [bbuser_baby] SET [id_user] = @id_user, [relation_to_baby] = @relation_to_baby, [sex_of_baby] = @sex_of_baby, [due_date] = @due_date, [baby_first_name] = @baby_first_name WHERE [id_baby] = @original_id_baby AND [id_user] = @original_id_user AND [relation_to_baby] = @original_relation_to_baby AND [sex_of_baby] = @original_sex_of_baby AND (([due_date] = @original_due_date) OR ([due_date] IS NULL AND @original_due_date IS NULL)) AND (([baby_first_name] = @original_baby_first_name) OR ([baby_first_name] IS NULL AND @original_baby_first_name IS NULL))">
<DeleteParameters>
<asp:Parameter Name="original_id_baby" Type="Int32" />
<asp:Parameter Name="original_id_user" Type="Int32" />
<asp:Parameter Name="original_relation_to_baby" Type="String" />
<asp:Parameter Name="original_sex_of_baby" Type="String" />
<asp:Parameter DbType="Date" Name="original_due_date" />
<asp:Parameter Name="original_baby_first_name" Type="String" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter Name="id_user" Type="Int32" />
<asp:Parameter Name="relation_to_baby" Type="String" />
<asp:Parameter Name="sex_of_baby" Type="String" />
<asp:Parameter DbType="Date" Name="due_date" />
<asp:Parameter Name="baby_first_name" Type="String" />
</InsertParameters>
<SelectParameters>
<asp:ControlParameter ControlID="txtTest" Name="id_user" PropertyName="Text" Type="Int32" />
</SelectParameters>
<UpdateParameters>
<asp:Parameter Name="id_user" Type="Int32" />
<asp:Parameter Name="relation_to_baby" Type="String" />
<asp:Parameter Name="sex_of_baby" Type="String" />
<asp:Parameter DbType="Date" Name="due_date" />
<asp:Parameter Name="baby_first_name" Type="String" />
<asp:Parameter Name="original_id_baby" Type="Int32" />
<asp:Parameter Name="original_id_user" Type="Int32" />
<asp:Parameter Name="original_relation_to_baby" Type="String" />
<asp:Parameter Name="original_sex_of_baby" Type="String" />
<asp:Parameter DbType="Date" Name="original_due_date" />
<asp:Parameter Name="original_baby_first_name" Type="String" />
</UpdateParameters>
</asp:SqlDataSource>
</div>
<div class="testbox">
</div>
<div class="bottom">
<div class="buttons"><asp:Button ID="btnSave" runat="server" Text="Save Changes" OnClick="btnSave_Click" /><asp:Button ID="btnLoad" runat="server" Text="Load" OnClick="btnLoad_Click" /></div></div>
</div>
</form>
</body>
</html>
请尝试从以下地址交换：
grdvwBabyInfo.DataBind();
cmdB.ExecuteNonQuery();
grdvwBabyInfo.DataBind();
cmdB.ExecuteNonQuery();
cmdB.ExecuteNonQuery();
grdvwBabyInfo.DataBind();