Question

我只想在行编辑模式中检测到该网格视图，此时我只想绑定下拉列表。我找到了很多文章，我发了这个代码

我有这个错误

DataBinding：＆＃39; AllProjects_Result＆＃39;不包含属性名称＆＃39; Projects＆＃39;。

  protected void GVAllProjects_RowDataBound(object sender, GridViewRowEventArgs e)
{
    DropDownList ddlDistrictName = null;
    DropDownList ddlPurposeName = null;
    DropDownList ddlTypes = null;
    if (e.Row.RowType == DataControlRowType.Footer && e.Row.RowState == DataControlRowState.Edit)
    {

        ddlDistrictName = e.Row.FindControl("ddlDistrictName") as DropDownList;
        ddlPurposeName = e.Row.FindControl("ddlPurposeName") as DropDownList;
        ddlTypes = e.Row.FindControl("ddlTypes") as DropDownList;
    }
    if (e.Row.RowType == DataControlRowType.DataRow)
    {

        ddlDistrictName = e.Row.FindControl("ddlDistrictName") as DropDownList;
        ddlPurposeName = e.Row.FindControl("ddlPurposeName") as DropDownList;
        ddlTypes = e.Row.FindControl("ddlTypes") as DropDownList;
    }
    if (ddlDistrictName != null)
    {
        using (AlamaarRealEstateEntities context = new AlamaarRealEstateEntities())
        {
            ddlDistrictName.DataSource = context.Districts.ToList();
            ddlDistrictName.DataTextField = "DistrictName";
            ddlDistrictName.DataValueField = "ID";
            ddlDistrictName.DataBind();

            ddlPurposeName.Items.Insert(0, new ListItem(""));
            ddlPurposeName.DataSource = context.Purposes.ToList();
            ddlPurposeName.DataTextField = "PurposeName";
            ddlPurposeName.DataValueField = "ID";
            ddlPurposeName.DataBind();

            ddlTypes.Items.Insert(0, new ListItem(""));

            ddlTypes.DataSource = context.Types.ToList();
            ddlTypes.DataTextField = "TypeName";
            ddlTypes.DataValueField = "ID";
            ddlTypes.DataBind();

        }
        if (e.Row.RowType == DataControlRowType.DataRow && (e.Row.RowState & DataControlRowState.Edit) == DataControlRowState.Edit)
        {

            ddlDistrictName.SelectedValue = (DataBinder.Eval(e.Row.DataItem, "DistrictID")).ToString();
            ddlPurposeName.SelectedValue = (DataBinder.Eval(e.Row.DataItem, "PurposeID")).ToString(); 
            ddlTypes.SelectedValue = (DataBinder.Eval(e.Row.DataItem, "TypeID")).ToString(); 
        }
    }
}

这些行的错误：

if (e.Row.RowType == DataControlRowType.DataRow && (e.Row.RowState & DataControlRowState.Edit) == DataControlRowState.Edit)
{
        ddlDistrictName.SelectedValue = (DataBinder.Eval(e.Row.DataItem, "DistrictID")).ToString();
        ddlPurposeName.SelectedValue = (DataBinder.Eval(e.Row.DataItem, "PurposeID")).ToString(); 
        ddlTypes.SelectedValue = (DataBinder.Eval(e.Row.DataItem, "TypeID")).ToString(); 
}

Answer 1

检查DataControlRowState事件中的RowDataBound。

protected void GVAllProjects_RowDataBound(object sender, GridViewRowEventArgs e)
{
    //check if the row is a datarow
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //check if the edit state > 0
        if ((e.Row.RowState & DataControlRowState.Edit) > 0)
        {
            //do stuff with the row that is being edited
        }
    }
}

在行数据绑定时以编辑模式检测网格视图

1 个答案: