Cellvalidating Error Text
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Datagridview Row Error Icon Not Showing
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of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Winforms: Problems validating a cell in a datagridview up vote 4 down vote favorite 1 I error font want to validate a Winforms datagridview cell with CellValidating. If a value was not set correctly by the user I set ErrorText and use e.Cancel, so that the cursor remains in the cell. The problem is now, that the error-symbol (and the error text) is not displayed (in the cell). When I delete e.Cancel the cell looses the focus and error-symbol is displayed. How can I achieve that the cell remains datagridview cellvalidating example in edit mode and the error-symbol is displayed too? if (...) { this.datagridviewX.Rows[e.RowIndex].Cells[e.ColumnIndex].ErrorText = "Errortext"; e.Cancel = true; } else { this.datagridviewX.Rows[e.RowIndex].Cells[e.ColumnIndex].ErrorText = ""; } c# .net winforms datagridview share|improve this question edited Oct 10 '11 at 14:35 asked Oct 10 '11 at 14:07 Kottan 2,02043158 As I say in my answer - what you are describing isn't the out of the box behaviour so you must be doing something unusual. Could you provide some code? –David Hall Oct 10 '11 at 14:19 add a comment| 1 Answer 1 active oldest votes up vote 7 down vote The behaviour you are seeing is actually due to a painting issue and not due to the error icon not being shown. What is happening is that when you set the cell's error text the icon is displayed but the text box of the cell in edit mode is painted over the icon, hence no icon shown to the user! You have two options for fixing this - one is to simply use the row's error text so instead of: this.datagridviewX.Rows[e.RowIndex].Cells[e.ColumnIndex].ErrorText = "Errortext"; e.Cancel = true; You have: this.datagridviewX.Rows[e.RowIndex].ErrorText = "Errortext"; e.Cancel = true; The other option is to change the cell padding of the cell (moving the editing control) and painting t
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C# Datagridview Error Handling
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Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up http://stackoverflow.com/questions/7713988/winforms-problems-validating-a-cell-in-a-datagridview CellValidating error on cell focus up vote 2 down vote favorite I got 2 Datagridview in my form and I'm using cell validation and cell validating event handler.. in my datagridview. If i leave the cursor in the cell itself and try to open a new file through menu click..i'm getting a error message : "Argument out of exception was unhandled by usercode, http://stackoverflow.com/questions/13106891/cellvalidating-error-on-cell-focus index was out of range." I know, when the cursor is in the cell, it got focus and it's in the process of cell validating that's why i'm getting this error. This line throws the error with the message : "Argument out of exception was unhandled by usercode, index was out of range." datagridview.Rows[e.RowIndex].ErrorText = ""; How can i avoid this error?? Or How can i remove focus during menu click to open a new file?? Thank you. private void datagridview_CellValidating(object sender, CellValidatingEventArgs e) { if (e.ColumnInfo.Name == "Item1" || e.ColumnInfo.Name == "Item2") { datagridview.Rows[e.RowIndex].ErrorText = ""; int newInteger; if (datagridview.Rows[e.RowIndex].IsModified) return; if (!int.TryParse(e.Value.ToString(), out newInteger) || newInteger < -50000 || newInteger > 50000) { e.Cancel = true; datagridview.Rows[e.RowIndex].ErrorText = "The value must be a non-negative integer"; } } } private void datagridview_CellValidated(object sender, CellValidatedEventArgs e) { if (e.ColumnIndex != 3) return; int nextRowIndex = e.RowIndex + 1; int lastRowIndex = datagridview.Rows.Count - 1; if (nextRowIndex <= lastRowIndex) { var value = datagridview.Rows[e.RowIndex].Cells[3].Value.ToString(); datagridview.Rows[nextRowIndex].Cells[2].Value = value; } } MenuItem Clik to open new files to the Datagridview: private void m_test1_Click_1(object sender, EventArgs e) { myconfig = Myconfig.DeserializeFromXmlFile(@"test2.xml")
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