[英]Getting selected index and row of drop down menu inside grid view
我有一個gridview,如果符合某些條件,則會在下拉列表中填充一個單元格:
protected void viewThemeTypeAssociationsGridView_OnRowDataBound(Object sender, GridViewRowEventArgs e)
{
if (e.Row.Cells[1].Text == " ")
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Cells[1].Text = "Not Assigned";
DropDownList chooseThemeTypeDropDown = (DropDownList)e.Row.FindControl("chooseThemeTypeDropDown");
chooseThemeTypeDropDown.Visible = true;
}
}
}
這是一張圖片:
這是下拉列表的許多副本,這些副本在某些行中可見。 如何訪問已更改的下拉列表的選定索引以及它所在的行?
我在想這樣的東西,但它不起作用:
protected void chooseThemeTypeDropDown_OnSelectedIndexChanged(object sender, EventArgs e)
{
DropDownList chooseThemeTypeDropDown = (DropDownList)e.Row.FindControl("chooseThemeTypeDropDown");
}
編輯:如果它有幫助這里是gridview:
<asp:GridView ID="viewThemeTypeAssociationsGridView" runat="server" AutoGenerateColumns="False"
BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px"
CellPadding="3" CellSpacing="2" DataSourceID="SqlDataSource6" OnRowDataBound="viewThemeTypeAssociationsGridView_OnRowDataBound">
<Columns>
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
<asp:BoundField DataField="Type" HeaderText="Type" SortExpression="Type" />
<asp:TemplateField HeaderText="Choose Theme Type">
<ItemTemplate>
<asp:DropDownList ID="chooseThemeTypeDropDown" runat="server" DataTextField="Type" DataValueField="PK_ThemeType" AutoPostBack="true" DataSourceID="SqlDataSource9" CssClass="dropDownList" OnDataBound="chooseThemeTypeDropDown_OnDataBound" Visible="false" OnSelectedIndexChanged="viewProductAssociationsDropDown_OnSelectedIndexChanged">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource9" runat="server" ConnectionString="<%$ ConnectionStrings:ApplicationServices %>"
SelectCommand="SELECT [Type], [PK_ThemeType] FROM [ThemeType] WHERE [Deleted] = 0 ORDER BY [Type] ASC">
</asp:SqlDataSource>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
<PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#FFF1D4" />
<SortedAscendingHeaderStyle BackColor="#B95C30" />
<SortedDescendingCellStyle BackColor="#F1E5CE" />
<SortedDescendingHeaderStyle BackColor="#93451F" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource6" runat="server" ConnectionString="<%$ ConnectionStrings:ApplicationServices %>"
SelectCommand="SELECT [Theme].[Name], [ThemeType].[Type] FROM [Theme] LEFT OUTER JOIN [ThemeType] ON [Theme].[ThemeTypeId] = [ThemeType].[PK_ThemeType] JOIN [ProductTheme] ON [ProductTheme].[ThemeId]=[Theme].[PK_Theme] WHERE ProductTheme.ProductID LIKE @productParam AND ProductTheme.ThemeId = Theme.PK_Theme AND COALESCE([THEME].[THEMETYPEID], 'null') LIKE @assignedParam GROUP BY [Theme].[Name], [ThemeType].[Type] ORDER BY CASE WHEN [ThemeType].[Type] IS NULL THEN 0 ELSE 1 END, [Theme].[Name]">
<SelectParameters>
<asp:QueryStringParameter Name="productParam" Type="String" />
<asp:QueryStringParameter Name="assignedParam" Type="String" />
</SelectParameters>
</asp:SqlDataSource>
編輯2:當前代碼
protected void chooseThemeTypeDropDown_OnSelectedIndexChanged(object sender, EventArgs e)
{
DropDownList chooseThemeTypeDropDown = sender as DropDownList;
if (chooseThemeTypeDropDown != null)
{
System.Diagnostics.Debug.WriteLine(chooseThemeTypeDropDown.SelectedItem.Value.ToString());
}
}
sender
將為您提供啟動事件的控件,如下所示:
protected void chooseThemeTypeDropDown_OnSelectedIndexChanged(object sender, EventArgs e)
{
DropDownList chooseThemeTypeDropDown = sender as DropDownList;
// Check to make sure the drop down exists before we try to work with it
if(chooseThemeTypeDropDown != null)
{
// Put logic here to work with drop down list
}
}
您確實需要將if (e.Row.RowType == DataControlRowType.DataRow)
移動到if (e.Row.RowType == DataControlRowType.DataRow)
條件的OnRowDataBound
。
現在,如果將chooseThemeTypeDropDown.AutoPostBack
設置為true,並將其設置為處理OnSelectedIndexChanged
事件,則可以通過將object sender
為DropDownList
來找到chooseThemeTypeDropDown
的正確實例。
要獲得行索引,這更難。 最快,但有點hacky的方法是將rowindex附加到GridView的RowDataBound
事件上的每個chooseThemeTypeDropDown
ID。
chooseThemeTypeDropDown.ID = chooseThemeTypeDropDown.ID + e.Row.RowIndex;
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