检查是否在datagridview中选择了行/列/单元格 [英] Checking for whether rows/columns/cells are selected in datagridview

问题描述

大家好！



我在检查数据网格视图中是否选择了单元格/列/行时遇到问题。



这是我的代码：

Hi everyone!

I am having an issue with checking for whether or not cells/columns/rows are selected in a datagridview.

Here is my code:

bool isRowSelected = dataGridView1.Rows[e.RowIndex - 1].Selected;
            bool isColumnSelected = dataGridView1.Columns[e.ColumnIndex].Selected;

            if (((dataGridView1.CurrentCell.ColumnIndex == 0) || (dataGridView1.CurrentCell.ColumnIndex == 1) || (dataGridView1.CurrentCell.ColumnIndex == 2)
                || (dataGridView1.CurrentCell.ColumnIndex == 3) || (dataGridView1.CurrentCell.ColumnIndex == 4)) && (!isRowSelected) || (!isColumnSelected))
            {
                this.comboBox1.Location = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Location;
                comboBox1.Width = 100;
                this.comboBox1.SelectedValue = this.dataGridView1.CurrentCell.Value;
                this.comboBox1.Show();
            }

预期输出：

单元格选择 - 组合框应该位于选定的单元格

行选中 - 突出显示该行而不显示任何其他内容

选择列 - 突出显示该列（或）按该列排序



实际输出：

单元格和行选择 - 相同

列选择 - 这是指向此行的错误。

bool isRowSelected = dataGridView1.Rows [e.RowIndex - 1] .Selected;

原因：索引超出范围。必须是非负数且小于集合的大小。 （ArgumentOutOfRangeException）



我想避免在选择行或列时出现组合框，只选择单元格选择。这是我的意图。



谢谢大家！

Expected Output:
Cell selected - combobox is supposed to be on top of the selected cell
Row selected - highlight that row and nothing else
Column selected - highlight that column (or) sort by that column

Actual Output:
Cell and Row selection - same
Column selection - this is erroring out pointing to this line.
bool isRowSelected = dataGridView1.Rows[e.RowIndex - 1].Selected;
For the reason of: Index was out of range. Must be non-negative and less than the size of the collection. (ArgumentOutOfRangeException)

I want to avoid having the combobox appear when a row or column is selected, just cell selection only. That is my intent.

Thanks everyone!

推荐答案

我能看到的第一个错误是： e.RowIndex 可以是0，在这种情况下， e.RowIndex - 1 将为-1，这当然是超出范围，使用此索引值进行索引会抛出 ArgumentOutOfRangeException 。



先修复此琐碎错误，然后再看如果你有其他问题。 :-)

-SA

The first bug I can see is: e.RowIndex can be 0, in this case, e.RowIndex − 1 will be −1, which is of course out of range, indexing with this index value throws ArgumentOutOfRangeException.

Fix this trivial bug first, and then see if you have other problems. :-)

—SA

这篇关于检查是否在datagridview中选择了行/列/单元格的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！