这是我的代码，它给出了ddl = null的值：
//event handler to bind the data to the row before rendering the gridview
protected void gridview1_RowDataBound(object sender ,GridViewRowEventArgs e)
{
if ((e.Row.RowType == DataControlRowType.DataRow)&&(e.Row.DataItem!=null))
{
//DropDownList ddlNo = (DropDownList)e.Row.FindControl("ddlNo");
DropDownList ddlNo = (DropDownList)e.Row.FindControl("ddlNo");
if (ddlNo != null)
{
ddlNo.DataSource = Test.GetData();
ddlNo.DataBind();
ddlNo.SelectedValue = gridview1.DataKeys[e.Row.RowIndex].Values[0].ToString();//datakeys are used to retain the value of the no. in edit mode
}
}
}
这是我的aspx代码：
<asp:GridView ID="gridview1" runat="server" AutoGenerateColumns="false" AutoGenerateDeleteButton="false" AutoGenerateEditButton="false" ShowFooter="true" EmptyDataText="No data available." PagerStyle-HorizontalAlign="Right" AllowPaging="true" AllowSorting="true" GridLines="Vertical" Width="98%" EnableViewState="true" OnRowCancelingEdit="gridview1_RowCancelingEdit" OnRowDataBound="gridview1_RowDataBound" OnRowEditing="gridview1_RowEditing" OnRowUpdating="gridview1_RowUpdating" OnRowCommand="gridview1_RowCommand" OnRowDeleting="gridview1_RowDeleting" DataKeyNames="testID">
<Columns>
<asp:TemplateField HeaderText="Select" HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<asp:Label ID="lblSelect" runat="server" Text="Select"></asp:Label>
<%-- <asp:CheckBox ID="chkSelect" runat="server" AutoPostBack="true" OnCheckedChanged="chkSelect_CheckChanged" />--%>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left" />
</asp:TemplateField>
<asp:BoundField DataField="testID" HeaderText="SearchId" />
<asp:TemplateField HeaderText="Name" HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:TextBox ID="txtName" runat="server" Text='<%#Eval("testDesc") %>' />
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtNewName" runat="server"></asp:TextBox>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblName" runat="server" Text='<%# Bind("testDesc") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left" />
</asp:TemplateField>
<asp:TemplateField HeaderText="No." HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:DropDownList ID="ddlNo" runat="server" DataTextField="testNo" DataValueField="testNo" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblNo" runat="server" Text='<%# Bind("testNo") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="ddlNewNo" runat="server" DataTextField="testNo" DataValueField="testNo">
</asp:DropDownList>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edit" ShowHeader="False">
<EditItemTemplate>
<asp:LinkButton ID="linkbt1" runat="server" CausesValidation="true" CommandName="Update" Text="Update">
</asp:LinkButton>
<asp:LinkButton ID="linkbt2" runat="server" CausesValidation="false" CommandName="Cancel" Text="Cancel"></asp:LinkButton>
</EditItemTemplate>
<ItemTemplate>
<asp:LinkButton ID="linkbt1" runat="server" CausesValidation="false" CommandName="Edit" Text="Edit">
</asp:LinkButton>
</ItemTemplate>
<FooterTemplate>
<asp:LinkButton ID="linkbt2" runat="server" CausesValidation="false" CommandName="AddNew" Text="AddNew">
</asp:LinkButton>
</FooterTemplate>
</asp:TemplateField>
<asp:CommandField HeaderText="Delete" ShowDeleteButton="true" ShowHeader="true" />
</Columns>
</asp:GridView>
任何人都可以为此提供相关解决方案吗？
答案 0 :(得分：3)
你把ddl no放在footer template中，但你只是在(e.Row.RowType == DataControlRowType.DataRow)将其更改为FooterRow并且它应该找到它
将上述行更改为
if（e.Row.RowType == DataControlRowType.Footer＆amp;＆amp; e.Row.DataItem！= null）
答案 1 :(得分：0)
＆LT;％ - 的DataKeyNames = “Environment_ID” - ％GT; '/＆gt; ＆LT;％ - “＆GT; '/＆gt; - ％GT; '/＆gt;
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblapp" runat="server" Text='<%# Eval("AppName") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="ddlAppFooter" class="SearchBoxRTD" runat="server" DataTextField="AppName"
DataValueField="SNO">
</asp:DropDownList>
</FooterTemplate>
<HeaderStyle HorizontalAlign="Left" />
</asp:TemplateField>
<asp:TemplateField HeaderText="TestType" HeaderStyle-Width="50">
<EditItemTemplate>
<asp:DropDownList ID="ddlTestTypeDataRow" class="SearchBoxRTD" runat="server" DataTextField="Testingtypedescription"
DataValueField="TestingTypeID">
</asp:DropDownList>
<asp:HiddenField ID="hdnTesttype" runat="server" Value='<%# Bind("Testtype") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblTestType" runat="server" Text='<%# Eval("Testingtypedescription") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="ddlTestTypeFooter" class="SearchBoxRTD" runat="server" DataTextField="Testingtypedescription"
DataValueField="TestingTypeID">
</asp:DropDownList>
</FooterTemplate>
<HeaderStyle HorizontalAlign="Left" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Scenario Type" HeaderStyle-Width="50">
<EditItemTemplate>
<asp:DropDownList ID="ddlScenarioTypeDataRow" class="SearchBoxRTD" runat="server" DataTextField="ScenarioTypedescription"
DataValueField="ScenarioTypeID">
</asp:DropDownList>
<asp:HiddenField ID="hdnScenariotype" runat="server" Value='<%# Bind("ScenarioTypeID") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblScenarioType" runat="server" Text='<%# Eval("ScenarioTypedescription") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="ddlScenarioTypeFooter" class="SearchBoxRTD" runat="server"
DataTextField="ScenarioTypedescription" DataValueField="ScenarioTypeID">
</asp:DropDownList>
</FooterTemplate>
<HeaderStyle HorizontalAlign="Left" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Scenario">
<EditItemTemplate>
<asp:TextBox ID="txtScenario" runat="server" Text='<%# Bind("Scenario") %>'></asp:TextBox>
<asp:RequiredFieldValidator ID="RFDGEdUI" runat="server" Font-Bold="true" ErrorMessage="*"
ControlToValidate="txtScenario" ValidationGroup="EditScenario"></asp:RequiredFieldValidator>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="LblScenario" runat="server" Text='<%# Bind("Scenario") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtfootScenario" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RFDGScenario" runat="server" Font-Bold="true" ErrorMessage="*"
ControlToValidate="txtfootScenario" ValidationGroup="AddScenario"></asp:RequiredFieldValidator>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Status">
<EditItemTemplate>
<asp:CheckBox ID="chkScenariostatus" runat="server" Checked='<%# Bind("Status") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="LblScenarioStatus" runat="server" Text='<%# Bind("Status") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:CheckBox ID="chkScenariofooter" runat="server" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edit" ShowHeader="False">
<EditItemTemplate>
<asp:LinkButton ID="lbkUpdateScenario" runat="server" ValidationGroup="EditScenario"
CausesValidation="True" CommandName="Update" Text="Update"></asp:LinkButton>
<asp:LinkButton ID="lnkCancelScenario" runat="server" CausesValidation="False" CommandName="Cancel"
Text="Cancel"></asp:LinkButton>
</EditItemTemplate>
<FooterTemplate>
<asp:LinkButton ID="lnkAddScenario" runat="server" ValidationGroup="AddScenario"
CausesValidation="True" CommandName="Insert" Text="Insert"></asp:LinkButton>
</FooterTemplate>
<ItemTemplate>
<asp:LinkButton ID="lnkEditScenario" runat="server" CausesValidation="False" CommandName="Edit"
Text="Edit"></asp:LinkButton>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left" />
</asp:TemplateField>
</Columns>
<EmptyDataTemplate>
No Applications available!
</EmptyDataTemplate>
</asp:GridView>
-------------------------------- CS -------------- ------------------------------------------
protected void grdScenario_RowDataBound（object sender，GridViewRowEventArgs e） { 尝试 { DataSet ds = GetData（“qtp_getservice”）; if（e.Row.RowType == DataControlRowType.DataRow） {
//services,environment,platform
// bool flag = false;
if (e.Row.RowType == DataControlRowType.DataRow && (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate))
{
Label lbl = (Label)e.Row.FindControl("LblScenarioStatus");
if (null != lbl && lbl.Text != "")
{
lbl.Text = (string.Compare(lbl.Text, "True", true) == 0) ? "Enabled" : "Disabled";
}
}
if (e.Row.RowType == DataControlRowType.DataRow && (e.Row.RowState & DataControlRowState.Edit) == DataControlRowState.Edit)
// {
// for (int i = 0; i < grdScenario.Rows.Count ; i++)
// {
// foreach (GridViewRow gvRow in grdScenario.Rows)
{
DropDownList ddlApp = (DropDownList)e.Row.FindControl("ddlAppDataRow");
DropDownList ddlTT = (DropDownList)e.Row.FindControl("ddlTestTypeDataRow");
DropDownList ddlST = (DropDownList)e.Row.FindControl("ddlScenarioTypeDataRow");
//Label lblapp = ((Label)e.Row.Cells[2].FindControl("lblapp"));
//Label lblTestType = ((Label)e.Row.Cells[3].FindControl("lblTestType"));
//Label lblScenarioType = ((Label)e.Row.Cells[4].FindControl("lblScenarioType"));
// Label lblapp = ((Label)grdScenario.Rows[i].Cells[2].FindControl("lblapp"));
//Label lblTestType = ((Label)grdScenario.Rows[i].Cells[3].FindControl("lblTestType"));
// Label lblScenarioType = ((Label)grdScenario.Rows[i].Cells[4].FindControl("lblScenarioType"));
if (ddlApp != null)
{
HiddenField hdnAppid = (HiddenField)e.Row.FindControl("hdnAppid");
ddlApp.DataSource = ds.Tables[4].DefaultView;
ddlApp.DataTextField = "AppName";
ddlApp.DataValueField = "SNO";
ddlApp.DataBind();
//ddlApp.SelectedIndex = ddlApp.Items.IndexOf(ddlApp.Items.FindByText(grdScenario.DataKeys[e.Row.RowIndex].Values[1].ToString()));
//ddlApp.SelectedItem.Text = lblapp.Text.ToString();
ddlApp.SelectedValue = hdnAppid.Value;
}
if (ddlTT != null)
{
HiddenField hdnTesttype = (HiddenField)e.Row.FindControl("hdnTesttype");
ddlTT.DataSource = ds.Tables[5].DefaultView;
ddlTT.DataTextField = "Testingtypedescription";
ddlTT.DataValueField = "TestingTypeID";
ddlTT.DataBind();
//ddlTT.SelectedItem.Text = lblTestType.Text.ToString();
ddlTT.SelectedValue = hdnTesttype.Value;
//ddlTT.SelectedIndex = ddlTT.Items.IndexOf(ddlTT.Items.FindByText(grdservices.DataKeys[e.Row.RowIndex].Values[2].ToString()));
}
if (ddlST != null)
{
HiddenField hdnScenariotype = (HiddenField)e.Row.FindControl("hdnScenariotype");
ddlST.DataSource = ds.Tables[6].DefaultView;
ddlST.DataTextField = "ScenarioTypeDescription";
ddlST.DataValueField = "ScenarioTypeID";
ddlST.DataBind();
ddlST.SelectedValue = hdnScenariotype.Value;
//ddlST.SelectedItem.Text = lblScenarioType.Text.ToString();
//ddlST.SelectedIndex = ddlST.Items.IndexOf(ddlST.Items.FindByText(grdScenario.DataKeys[e.Row.RowIndex].Values[3].ToString()));
}
}
// }
//// }
}
if (e.Row.RowType == DataControlRowType.Footer)
{
//Bind environment,platform at footer.
DropDownList cmbNewType = (DropDownList)e.Row.FindControl("ddlAppFooter");
cmbNewType.DataSource = ds.Tables[4].DefaultView;
cmbNewType.DataBind();
DropDownList cmbNewType1 = (DropDownList)e.Row.FindControl("ddlTestTypeFooter");
cmbNewType1.DataSource = ds.Tables[5].DefaultView;
cmbNewType1.DataBind();
DropDownList cmbNewType2 = (DropDownList)e.Row.FindControl("ddlScenarioTypeFooter");
cmbNewType2.DataSource = ds.Tables[6].DefaultView;
cmbNewType2.DataBind();
}
}
catch (System.Exception) { }
}