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POControls.Remove() does not work after CreateChildControls?
 

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  1. POControls.Remove() does not work after CreateChildControls?
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    <p>I am developing a SharePoint 2010 non-visual WebPart which displays some kind of data in a big table. The table rows should be filtered by selecting a filter criterium from a DropDownList which is part of the webpart.</p> <p>The OnSelectedIndexChanged event of the DropDownList is fired after CreateChildControls and before OnPreRender. Because the cells of the table contain LinkButtons with an OnClick event attached, they must be created in CreateChildControls in order to get the OnClick events fired.</p> <p>I don't know which rows of the table to hide until the OnSelectedIndexChanged of the DropDownList is fired, so I create all possible table rows in CreateChldControls and try to remove the filtered ones later in OnSelectedIndexChanged the event directly or in OnPreRender. The rows were physically removed from the parent Table's control collection, but they are nevertheles displayed. </p> <p>As a test, I tried to remove some random rows at the end of the CreateChildControls method after creating them, it worked and the rows were not rendered.</p> <p>How I remove the rows: </p> <pre><code> Table mt = FindControl("matrixtable") as Table; Helpers.Log("Controls in Table: " + mt.Controls.Count); foreach (int kdid in kdIdsInvisible) { TableRow c = mt.FindControl("kdrow" + kdid) as TableRow; Helpers.Log(c.ID); mt.Controls.Remove(c); } Helpers.Log("Controls in Table: " + mt.Controls.Count); </code></pre> <p>Output:</p> <pre><code>Controls in Table: 88 Controls in Table: 2 </code></pre> <p>But all rows are still rendered...</p> <p>Is there a solution for this? Thank you in advance!</p>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. USelsni
    1. USelsni
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. POControls.Remove() does not work after CreateChildControls?
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    2. VO
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      1. POControls.Remove() does not work after CreateChildControls?
      1. This table or related slice is empty.
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    3. VO
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      1. POControls.Remove() does not work after CreateChildControls?
      1. This table or related slice is empty.
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    1. COAre you sure you are not databinding after your removed the controls? Try to do the remove on PreRender.
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      1. POControls.Remove() does not work after CreateChildControls?
      1. USPeter
    2. COI tried to remove the controls in OnPreRender first. It did not work. The controls were removed, (I checked that) but they are rendered anyway. Removing the controls only worked in CreateChildControls, but at this time I do not know which to remove. I would know that in OnPreRender. Chicken or egg dilemma.
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      1. POControls.Remove() does not work after CreateChildControls?
      1. USelsni
    3. COInstead of adding the table on CreateChildControls, add the items to a seperate list. Then add then in OnPreRender where you know which ones to add. Just a workaround. It seens the is something else wrong with your code, and you will have problems with handling the postback event if you do not add the dynamic controls on init or load. Maybe you can store the list in your viewstate to do the correct rendering there.
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      1. POControls.Remove() does not work after CreateChildControls?
      1. USPeter
 

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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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