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我在數據庫中兩個表如下:如何使用DropDownList更新GridView中的一個值的狀態?
建議表:ID,標題,描述,StatusID ...等
SuggestionsStatus表:ID,狀態
我使用的GridView顯示建議,並在最後一列我把一個DropDownList,爲每個建議選擇狀態。現在,當我試圖通過從DropDownList中選擇狀態來更新其中一個提交的建議的狀態時,該值已被選中,但它已更新,但是對於所有建議,我不知道爲什麼我不知道爲什麼。 .NET代碼:
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="ID"
width="950px" CssClass="mGrid"
AlternatingRowStyle-CssClass="alt"
RowStyle-HorizontalAlign="Center"
DataSourceID="SqlDataSource1"
OnRowDataBound="GridView1_RowDataBound" >
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<HeaderStyle Font-Bold = "true" ForeColor="Black" Height="20px"/>
<Columns>
<asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False"
ReadOnly="True" SortExpression="ID" />
<asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
<asp:BoundField DataField="Description" HeaderText="Description"
SortExpression="Description" />
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
<asp:BoundField DataField="Username" HeaderText="Username"
SortExpression="Username" />
<asp:BoundField DataField="DivisionShortcut" HeaderText="Division"
SortExpression="DivisionShortcut" />
<asp:TemplateField HeaderText="Status">
<ItemTemplate>
<asp:DropDownList ID="DropDownList" runat="server" DataSourceID="SqlDataSource2"
Font-Bold="True" ForeColor="#006666" AppendDataBoundItems="false"
DataTextField="Status" DataValueField="ID" AutoPostBack="true"
OnDataBound="DropDownList_DataBound">
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
SelectCommand="SELECT dbo.SafetySuggestionsLog.ID, dbo.SafetySuggestionsLog.Title, dbo.SafetySuggestionsLog.Description, dbo.employee.Name, dbo.SafetySuggestionsLog.Username,
dbo.Divisions.DivisionShortcut
FROM dbo.employee INNER JOIN
dbo.SafetySuggestionsLog ON dbo.employee.Username = dbo.SafetySuggestionsLog.Username INNER JOIN
dbo.Divisions ON dbo.employee.DivisionCode = dbo.Divisions.SapCode"
FilterExpression="[DivisionShortcut] like '{0}%'">
<FilterParameters>
<asp:ControlParameter ControlID="ddlDivision" Name="DivisionShortcut"
PropertyName="SelectedValue" Type="String" />
</FilterParameters>
</asp:SqlDataSource>
<%--For the DropDownList--%>
<asp:SqlDataSource ID="SqlDataSource2" runat="server"
ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
SelectCommand="SELECT * FROM [SafetySuggestionsStatus]"></asp:SqlDataSource>
我的代碼隱藏:
protected void DropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
DropDownList ddl = (DropDownList)sender;
int suggestionStatus = int.Parse(ddl.SelectedValue);
//For inserting the status in the database
string connString = "Data Source=localhost\\sqlexpress;Initial Catalog=psspdbTest;Integrated Security=True";
string updateCommand = "UPDATE SafetySuggestionsLog SET [StatusID] = @StatusID WHERE [ID] = @ID";
using (SqlConnection conn = new SqlConnection(connString))
{
conn.Open();
using (SqlCommand cmd = new SqlCommand(updateCommand, conn))
{
cmd.Parameters.Clear();
cmd.Parameters.AddWithValue("@StatusID", suggestionStatus);
cmd.ExecuteNonQuery();
}
conn.Close();
}
}
**編輯:**
我修改DropDownList_SelectedIndexChanged()
如上示出,但噸現在他的問題是:
,當我嘗試更新的建議之一的地位,那麼所有建議的狀態將被更新,我不知道爲什麼
那麼,如何解決這個問題能夠更新數據庫中(GridView)中提交的建議之一的狀態嗎?**
感謝您的幫助,但我得到了以下錯誤,我不知道爲什麼:不能將類型'object'隱式轉換爲'string'。存在明確的轉換(您是否缺少演員表)? – 2012-02-28 11:16:13
請參閱我的更新 – 2012-02-28 11:25:31
謝謝。我非常感謝你的幫助。 – 2012-02-28 11:48:38