ITemplate ID必须是唯一的

Question

I am working on a project where i need to create a Datagrid TemplateColumn via the codebehind which will contain an ImageButton; i have found what i required on CodeProject , but the only issue i have is when i run the code at run-time i get the following exception when trying to find the Control via the ItemDataBound method of the DataGrid

Multiple controls with the same ID 'uxPlusMinusImageButton' were found. FindControl requires that controls have unique IDs.

This is my code

DataGridPopulateMethod

private void PopulateDataGrid()
{
    TemplateColumn plusMinusContractImage = new TemplateColumn();
    plusMinusContractImage.ItemTemplate = new PlusMinusColumn("uxPlusMinusImageButton");

uxSummaryInfoDataGrid.ItemDataBound += new DataGridItemEventHandler(uxSummaryInfoDataGrid_ItemDataBound);
uxSummaryInfoDataGrid.DataSource = contracts;
uxSummaryInfoDataGrid.Columns.Add(new BoundColumn() { HeaderText = "ID", DataField = "ColumnID", Visible = false });
uxSummaryInfoDataGrid.Columns.Add(plusMinusContractImage);
uxSummaryInfoDataGrid.Columns.Add(new BoundColumn() { HeaderText = "Title 1", DataField = "Column1" });
uxSummaryInfoDataGrid.Columns.Add(new BoundColumn() { HeaderText = "Title 2", DataField = "Column2" });
uxSummaryInfoDataGrid.DataBind();

DataGridOnItemDataBoundMethod

private void uxSummaryInfoDataGridItemDataBound(DataGrid summaryDataGrid, DataGridItem item)
{
    if (item.ItemType == ListItemType.Item || item.ItemType == ListItemType.AlternatingItem)
    {
        SummaryInformation summaryInfo = (SummaryInformation)item.DataItem;
        ImageButton plusMinusImageButton = (ImageButton)item.Cells[1].FindControl("uxPlusMinusImageButton");
        plusMinusImageButton.Click += new ImageClickEventHandler(PlusMinusImageButton_Click);

ImageButton Click

protected void PlusMinusImageButton_Click(object sender, ImageClickEventArgs e)
{
  PopulateDataGrid();
}

Answer 1

我解决了这个问题，因为没有清除原始动态datagrid列，所以出现了此错误，因此它使控件具有相同的名称。