【发布时间】:2015-02-12 17:08:13
【问题描述】:
我有一个带有 3 个模板字段列的网格视图。当gridview数据绑定时,会在占位符所在的模板字段中生成一个输入文本框。
问题是,是否可以在回发时从代码隐藏文件中的输入框中获取值?还是需要用js做客户端?
这是 gridview 的精简版:
<asp:GridView ID="GV" runat="server"
AutoGenerateColumns="False" CellPadding="3"
DataSourceID="DS" Font-Size="X-Small" Width="100%" BackColor="White" CellSpacing="1"
BorderColor="#333333" BorderStyle="Inset" BorderWidth="1px"
ShowFooter="True" ondatabound="GV_DataBound"
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField>
<HeaderTemplate>
</HeaderTemplate>
</asp:TemplateField>
<asp:BoundField DataField="SKILL" HeaderText="Skill" HtmlEncode="False" SortExpression="SKILL">
</asp:BoundField>
<asp:BoundField DataField="COMP_GEN" HeaderText="Competencies (General)" HtmlEncode="False"
SortExpression="COMP_GEN">
</asp:BoundField>
<asp:TemplateField HeaderText="Designer Score">
<ItemTemplate>
<asp:PlaceHolder runat='server' ID="devGenDesScore"></asp:PlaceHolder>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="devGenDesScoreTotal_txt" name="inputs" runat="server" Width="50px"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#C6C3C6" ForeColor="Black" />
<HeaderStyle BackColor="#005293" Font-Bold="True" ForeColor="white" BorderColor="Gray"
BorderStyle="Solid" BorderWidth="1px" />
<PagerStyle BackColor="#C6C3C6" ForeColor="Black" HorizontalAlign="Right" />
<RowStyle BackColor="White" ForeColor="#253E51" />
<SelectedRowStyle BackColor="#9471DE" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#594B9C" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#33276A" />
</asp:GridView>
我已经尝试了这个的变体,但无法让它工作:
TextBox compGenDesScoreTxt = GV.Rows[i].Cells[3].Controls[0] as TextBox;
int compGenDesScore = Convert.ToInt32(compGenDesScoreTxt.Text);
它在int compGenDesScore = Convert.... 行抛出这个错误:
System.NullReferenceException:对象引用未设置为对象的实例。
这就是我生成输入框的方式:
protected void GV_DataBound(object sender, EventArgs e)
{
int c = GV.Columns.Count;
int r = GV.Rows.Count;
//Loop through each row
for (int i = 0; i < r; i++)
{
//Loop through each column on that row
for (int j = 0; j < c; j++)
{
//First competancy
if (j == 2)
{
//Read the contents of the cell, if its blank, do nothing. If it has text, add a textbox for the score
contents = GV.Rows[i].Cells[j].Text;
if (contents != " ")
{
PlaceHolder placeHolder = GV.Rows[i].FindControl("devGenDesScore") as PlaceHolder;
TextBox devGenDesScore_txt = new TextBox();
devGenDesScore_txt.ID = "devGenDesScore_txt";
devGenDesScore_txt.Style.Add("width", "50px");
placeHolder.Controls.Add(devGenDesScore_txt);
}
}
}
}
}
【问题讨论】:
-
你能试着找到文本框控件吗,字符串 x=((TextBox)GV.Rows[i].FindControl("devGenDesScore")).Text;
-
抛出同样的错误。可能与文本框ID有关吗?我在解释我如何生成文本字段的问题中添加了更多代码
-
您传递给
FindControl()的ID 应该是您在创建控件时为其分配的ID。再次尝试 Anurag 的代码,但使用正确的 ID。 -
当我尝试 Anurag 的代码时,我确实使用了创建字段时分配的 ID,即
string x=((TextBox)GV.Rows[i].FindControl("devGenDesScore_txt")).Text;
标签: javascript c# asp.net gridview