我有以下数据库设计：
Employee Table: Username, Name, JobTitle, BadgeNo, IsActive, DivisionCode
Divisions Table: SapCode, DivisionShortcut
我有一个GridView，我用它来添加，删除和更新/编辑员工信息。此信息是员工用户名，名称，BadgeNo，JobTitle，IsActive和DivisionShortcut。分部将列在DropDownList中。我写了代码，但我收到以下错误： *
无效的列名称'DivisionShortcut'。
ASP.NET代码：
<asp:TemplateField HeaderText="Division">
<ItemTemplate>
<%# Eval("DivisionShortcut")%>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="DivisionsList" runat="server" DataSourceID="DivisionsListDataSource"
DataTextField="DivisionShortcut" DataValueField="SapCode"></asp:DropDownList>
</EditItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Username" HeaderText="Network ID" ReadOnly="True"
SortExpression="Username" />
<asp:TemplateField HeaderText="Name">
<ItemTemplate>
<%# Eval("Name")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtEmployeeName" runat="server" Text='<%# Bind("Name")%>' />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Job Title">
<ItemTemplate>
<%# Eval("JobTitle")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtJobTitle" runat="server" Text='<%# Bind("JobTitle")%>' />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Badge No.">
<ItemTemplate>
<%# Eval("BadgeNo")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtBadgeNo" runat="server" Text='<%# Bind("BadgeNo")%>' />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Is Active?">
<ItemTemplate>
<%# Eval("IsActive")%>
</ItemTemplate>
<EditItemTemplate>
<asp:CheckBox ID="isActive" runat="server"
Checked='<%# Eval("IsActive").ToString().Equals("True") %>'/>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Delete?">
<ItemTemplate>
<span onclick="return confirm('Are you sure to Delete the record?')">
<asp:LinkButton ID="lnkB" runat="Server" Text="Delete" CommandName="Delete"></asp:LinkButton>
</span>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:UsersInfoDBConnectionString %>"
SelectCommand="SELECT dbo.Divisions.DivisionShortcut, dbo.employee.Username, dbo.employee.Name, dbo.employee.JobTitle, dbo.employee.BadgeNo, dbo.employee.IsActive
FROM dbo.Divisions INNER JOIN
dbo.employee ON dbo.Divisions.SapCode = dbo.employee.DivisionCode"
UpdateCommand="UPDATE [employee], [Divisions] SET [Name] = @Name, [JobTitle] = @JobTitle,
[BadgeNo] = @BadgeNo, [DivisionShortcut] = @division WHERE [Username] = @Username"
DeleteCommand="DELETE FROM [employee] WHERE [Username] = @Username">
<UpdateParameters>
<asp:Parameter Name="Name" Type="String" />
<asp:Parameter Name="JobTitle" Type="String" />
<asp:Parameter Name="BadgeNo" Type="String" />
<asp:Parameter Name="DivisionShortcut" Type="String" />
<asp:Parameter Name="Username" Type="String" />
</UpdateParameters>
<DeleteParameters>
<asp:Parameter Name="Username" Type="String" />
</DeleteParameters>
</asp:SqlDataSource>
我忘了提到DropDownList有一个SqlDataSource。
<asp:SqlDataSource ID="DivisionsListDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:UsersInfoDBConnectionString %>"
SelectCommand="SELECT * FROM Divisions">
</asp:SqlDataSource>
更新
//For editing any row in the GridView
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
}
//For updating the information in any row in the GridView
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridViewRow gvrow = GridView1.Rows[e.RowIndex];
DropDownList DivisionsList = (DropDownList)gvrow.FindControl("DivisionsList");
TextBox txtEmployeeName = (TextBox)gvrow.FindControl("txtEmployeeName");
TextBox txtJobTitle = (TextBox)gvrow.FindControl("txtJobTitle");
TextBox txtBadgeNo = (TextBox)gvrow.FindControl("txtBadgeNo");
CheckBox isActive = (CheckBox)gvrow.FindControl("isActive");
//For getting the ID (primary key) of that row
string username = GridView1.DataKeys[e.RowIndex].Value.ToString();
string name = txtEmployeeName.Text;
string jobTitle = txtJobTitle.Text;
string badgeNo = txtBadgeNo.Text;
string division = DivisionsList.SelectedValue.ToString();
UpdateEmployeeInfo(username, name, jobTitle, badgeNo, division);
}
private void UpdateEmployeeInfo(string username, string name, string jobTitle, string badgeNo, string division)
{
string connString = ConfigurationManager.ConnectionStrings["UsersInfoDBConnectionString"].ConnectionString;
SqlConnection conn = new SqlConnection(connString);
string update = @"UPDATE Employee SET Name = @Name, JobTitle = @JobTitle,
BadgeNo = @BadgeNo, DivisionShortcut = @division
WHERE Username = @Username";
SqlCommand cmd = new SqlCommand(update, conn);
cmd.Parameters.AddWithValue("@Name", name);
cmd.Parameters.AddWithValue("@JobTitle", jobTitle);
cmd.Parameters.AddWithValue("@BadgeNo", badgeNo);
cmd.Parameters.AddWithValue("@division", division);
cmd.Parameters.AddWithValue("@Username", username);
//cmd.Parameters.AddWithValue("@IsActive", isActive.checked);
try
{
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
GridView1.EditIndex = -1;
// SqlDataSource1.UpdateCommand = @"UPDATE Employee SET Name = @Name, JobTitle = @JobTitle,
// BadgeNo = @BadgeNo
// WHERE Username = @Username";
// SqlDataSource1.Update();
}
catch (Exception ex)
{
throw ex;
}
finally
{
cmd.Dispose();
conn.Close();
conn.Dispose();
}
GridView1.DataBind();
}
错误是： System.Data.SqlClient.SqlException：无效的列名称'DivisionShortcut'。
在UpdateEmployeeInfo（）
的Catch块中触发更新2：
DivisionShortcut的更新查询将如下所示：
UPDATE Divisions SET [DivisionShortcut] = @division WHERE SapCode = @SapCode
但是如何更新？
答案 0 :(得分：1)
“DivisionShortcut”列出现在表格Divisions中。
并且您在employees表中更新它，因为发生了错误。
请从此更新查询中删除列DivisionShortcut
string update = @"UPDATE Employee SET Name = @Name, JobTitle = @JobTitle,
BadgeNo = @BadgeNo, DivisionShortcut = @division
WHERE Username = @Username";
并编写其他更新查询以更新Divisions表中的DivisionShortcut。
但它将如何更新？您必须以调用更新员工的方式调用此查询。或者您可以将查询放在同一个更新命令中。
string update = @"UPDATE Employee SET Name = @Name, JobTitle = @JobTitle,
BadgeNo = @BadgeNo, DivisionShortcut = @division WHERE Username = @Username;
UPDATE Divisions SET [DivisionShortcut] = @division WHERE SapCode = @SapCode;"
更新答案：
错误：The error is: Must declare the scalar variable "@SapCode"
像这样
cmd.Parameters.AddWithValue("@SapCode", sapcode);
再次更新答案：
string query = "Select sapcode from Divisons where Divison.DivisonCode = Employees.DivisonCode"
要从employees表中获取最新的Division代码，您可以使用sql server ScopeIdentity（）功能。