在SharePoint中从Gridview查找动态添加的控件

Question

我在用户控件中有一个gridview，并使用占位符动态添加了控件，现在我从网格中找到控件，它给出了控件在网格中不存在的代码如下：

foreach (GridViewRow row in GridView1.Rows)
{
PlaceHolder plc = (PlaceHolder)row.FindControl("lblPlaceHolder");
TextBox txtTextBox1 = plc.FindControl("txtTextBox1") as TextBox; //its give Null 
}

谁能回答我

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从注释中添加了代码：

foreach (GridViewRow dr in GridView1.Rows) 
{ PlaceHolder placeHolder = dr.FindControl("lblPlaceHolder") as PlaceHolder; 
  TextBox txtTextBox1= new TextBox(); 
  txtTextBox1.Width = 300; 
  placeHolder.Controls.Add(txtTextBox1);
} 

Answer 1

删除占位符，您将能够找到您的控件

并使用网格中的onRowDatabound或onRowCreated事件找到控件。

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顺便说一句：为什么您的占位符称为lblPlaceHolder，您是否在其中有一个标签，也许您是在询问错误的contol来查找yr文本框，这就是为什么您得到null的原因

void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    GridViewRow row = e.Row as GridViewRow;
    if (row != null)
    {

    TableCell myCell = row.Cells[0] as TableCell
    TextBox txtTextBox1= new TextBox(); 
    txtTextBox1.Width = 300; 
    myCell.Controls.Add(txtTextBox1);

    }
}