在 gridview C# 上操作文本框

Question

我正在尝试创建一个 table 样的图形。当我单击“编辑”时，我需要更改列中该行的文本框才能启用。

我的活动有这个代码。问题是 GVBookDetails.FindControl 返回 null，我不明白为什么，因为我有那个控制权。

protected void btnEditQuantity_Click(object sender, EventArgs e)
{
    int productID = Convert.ToInt32((sender as Button).CommandArgument); // get productID from EditButton
    Book book = (Book)Session["BookID"]; // object instance to use in edit query

    TextBox textBox = GVBookDetails.FindControl("tbQuantityEdit") as TextBox;

    textBox.Enabled = true;
    int quantity = Convert.ToInt32(textBox.Text);
}

Answer 1

您似乎正试图在 GridView 本身中查找 TextBox。不是按钮和文本框所在的行。您可以使用发件人的 NamingContainer 来查找 TextBox。

protected void btnEditQuantity_Click(object sender, EventArgs e)
{
    //cast the sender back to a button
    Button cb = sender as Button;

    //get the current gridviewrow from the button namingcontainer
    GridViewRow row = cb.NamingContainer as GridViewRow;

    //use findcontrol to locate the textbox in that row
    TextBox tb = row.FindControl("tbQuantityEdit") as TextBox;

    //do something with the textbox
    tb.Text = "TextBox found!";
}

在 gridview C# 上操作文本框

Manipulate textbox on gridview C#

c#

asp.net

gridview