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POHow to remove unwanted whitespace when filling listview with items (c#)
 

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  1. POHow to remove unwanted whitespace when filling listview with items (c#)
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    <p>Using c#, winforms. </p> <p><strong>Background:</strong></p> <p>The user should be able to select items from my menu strip, and then based on that the list view columns should be populated. Example: Select percent from 100-80 % then columns 1 and 2 get populated. Select total trans from &lt;1000 and then column 3 and 4 get populated.</p> <p><strong>Problem:</strong></p> <p>When adding items to my listview, say I select option 1 from menu strip. Then columns 1 and 2 get filled up. Good. BUT right after if I select option from total trans, the column 3 and 4 do get filled up, BUT there is a ton of WHITEspace in the columns. Basically, the columns should not have white space when getting filled up.</p> <p>This is what I mean: Notice the whitespace (outlined by red). First I selected option 1, then as soon as I selecte the option to populate column 3 and 4, they filled, but with whitespace. The column values for col 3 and 4 should have nothing above them in white.</p> <p><img src="https://i.stack.imgur.com/nEcPQ.png" alt="enter image description here"></p> <p>Also here: I select another option from menu strip (for col 1 and 2) , <em>after selecting the option to fill column 3 and 4,</em> and more whitespace:</p> <p><img src="https://i.stack.imgur.com/ObnP9.png" alt="enter image description here"></p> <p><strong>Code:</strong></p> <pre><code> // Fill Column 1 and 2 from option 1 private void toolStripMenuItem2_Click(object sender, EventArgs e) { int totItems = Seq3.Count - 1; if (PercentPopTolerance1.Count - 1 &gt; totItems) totItems = PercentPopTolerance1.Count - 1; for (int i = 0; i &lt;= totItems; i++) { ListViewItem lvi = new ListViewItem(); string item1 = ""; string item2 = ""; if (Seq3.Count - 1 &gt;= i) item1 = Seq3[i].ToString(); if (PercentPopTolerance1.Count - 1 &gt;= i) item2 = PercentPopTolerance1[i].ToString(); lvi.SubItems.Add(item1); lvi.SubItems.Add(item2); listView2.Items.Add(lvi); } } // Percent tolerance from 80-60% // Fill Column 1 and 2 from option 2 private void toolStripMenuItem3_Click_1(object sender, EventArgs e) { ClearColumn("columnHeader5"); int totItems = Seq4.Count - 1; if (PercentPopTolerance2.Count - 1 &gt; totItems) totItems = PercentPopTolerance2.Count - 1; for (int i = 0; i &lt;= totItems; i++) { ListViewItem lvi = new ListViewItem(); string item1 = ""; string item2 = ""; if (Seq4.Count - 1 &gt;= i) item1 = Seq4[i].ToString(); if (PercentPopTolerance2.Count - 1 &gt;= i) item2 = PercentPopTolerance2[i].ToString(); lvi.SubItems.Add(item1); lvi.SubItems.Add(item2); listView2.Items.Add(lvi); } } // Fill columns 3 and 4 from option in total trans menustrip // Total trans tolerance &lt; 1000 private void etcToolStripMenuItem_Click(object sender, EventArgs e) { int totItems = YYMMt21.Count - 1; if (TotalTransIrregularitiest21.Count - 1 &gt; totItems) totItems = TotalTransIrregularitiest21.Count - 1; for (int i = 0; i &lt;= totItems; i++) { ListViewItem lvi = new ListViewItem(); string item1 = ""; string item2 = ""; if (YYMMt21.Count - 1 &gt;= i) item1 = YYMMt21[i].ToString(); if (TotalTransIrregularitiest21.Count - 1 &gt;= i) item2 = TotalTransIrregularitiest21[i].ToString(); // Skip first 2 columns lvi.SubItems.Add(string.Empty); lvi.SubItems.Add(string.Empty); lvi.SubItems.Add(item1); lvi.SubItems.Add(item2); listView2.Items.Add(lvi); } } </code></pre> <p><strong><em>EDIT: Trying User suggestion:</em></strong></p> <p>New problem arises: what is supposed to be in column 3 and 4 vertically now fills the listview from the first row horizontally: <img src="https://i.stack.imgur.com/4Jxfw.png" alt="enter image description here"></p> <p>My attempt:</p> <pre><code> private void etcToolStripMenuItem_Click(object sender, EventArgs e) { int totItems = YYMMt21.Count - 1; if (TotalTransIrregularitiest21.Count - 1 &gt; totItems) totItems = TotalTransIrregularitiest21.Count - 1; for (int i = 0; i &lt;= totItems; i++) { ListViewItem lvi = new ListViewItem(); string item1 = ""; string item2 = ""; if (YYMMt21.Count - 1 &gt;= i) item1 = YYMMt21[i].ToString(); if (TotalTransIrregularitiest21.Count - 1 &gt;= i) item2 = TotalTransIrregularitiest21[i].ToString(); // Skip first 2 columns lvi.SubItems.Add(string.Empty); lvi.SubItems.Add(string.Empty); int rowToPopulate = 0; int colToPopulate = 0; if (rowToPopulate &lt;= listView2.Items.Count - 1) { //Editing an existing row/ListViewItem listView2.Items[rowToPopulate].SubItems.Insert(colToPopulate, new ListViewItem.ListViewSubItem() { Text = item1 }); // How would I also add item2? // listView2.Items[rowToPopulate].SubItems.Insert(colToPopulate, new ListViewItem.ListViewSubItem() { Text = item2 }); } else { //Adding a new row/ListViewItem // ListViewItem lvi = new ListViewItem(); lvi.SubItems.Add(item1); lvi.SubItems.Add(item2); //Add all the other Subitems as usual listView2.Items.Add(lvi); } //listView2.Items.Add(lvi); } } </code></pre>
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