Gridview 编辑值

Posted 2023-05-07

【中文标题】Gridview 编辑值

【英文标题】：Gridview edit value

【发布时间】：2011-09-25 14:11:36

【问题描述】：

我有一个从数据库动态填充的网格视图。有些字段很长。我找到了一种减少单元格中文本长度的方法。 现在，当我在编辑视图中时，所有的字段都在单行文本框中，对于文本量来说太小了。如何用另一个字段替换 texbox？最好用<textarea></textarea>

<div style="overflow:auto;">
    <asp:GridView ID="gvData" OnRowDataBound="gvData_RowDataBound" OnRowEditing="gvData_RowEditing" runat="server" CellPadding="4" 
        ForeColor="#333333" GridLines="Vertical" AllowPaging="True" 
        AutoGenerateDeleteButton="True" AutoGenerateEditButton="True" DataSourceID="DS">
        <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
        <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
        <PagerStyle BackColor="#284775" ForeColor="White" />
        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
        <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
        <EditRowStyle BackColor="#999999" />
        <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
    </asp:GridView>
    <asp:SqlDataSource ID="DS" runat="server"></asp:SqlDataSource>
</div>

protected void gvData_RowDataBound(object sender, GridViewRowEventArgs e)

    if (e.Row.RowType == DataControlRowType.DataRow)
    
        for (int i = 0; i < e.Row.Cells.Count; i++)
        
            TextBox txtBox = new TextBox();

            ViewState["OrigData"] = e.Row.Cells[i].Text;
            if (e.Row.Cells[i].Text.Length >= 30)
            
                e.Row.Cells[i].Text = 
                    e.Row.Cells[i].Text.Substring(0, 30) + "...";
                e.Row.Cells[i].ToolTip = ViewState["OrigData"].ToString();
            
            e.Row.Cells[i].Wrap = false;

        
    

【参考方案1】：

试试下面的代码

protected void gvData_RowDataBound(object sender, GridViewRowEventArgs e)

    if (e.Row.RowType == DataControlRowType.DataRow)
    
        for (int i = 0; i < e.Row.Cells.Count; i++)
        
            TextBox txtBox = e.Row.Cells[i].Controls[0] as TextBox;
    txtBox.TextMode = TextBoxMode.MultiLine;

        
    

【讨论】：

这行不通。 RowDataBound 上没有文本框。它是在 Rowediting 上创建的。

【参考方案2】：

找到了解决办法：

protected void gvData_PreRender(object sender, EventArgs e)

    if (this.gvData.EditIndex != -1)
    
        TextBox tb = new TextBox();

        for (int i = 0; i < gvData.Rows[gvData.EditIndex].Cells.Count; i++)
            try
            
                tb = (TextBox)
                    gvData.Rows[gvData.EditIndex].Cells[i].Controls[0];

                if (tb.Text.Length >= 30)
                
                    tb.TextMode = TextBoxMode.MultiLine;
                
            
            catch