将列添加到 DataGridView (VB.NET)
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Add column to DataGridView (VB.NET)
提问by F.C. Hsiao
I would like to add a new column in my project, but a weird thing happened...
我想在我的项目中添加一个新列，但是发生了一件奇怪的事情......
My code
我的代码
adapter.fill(datatable)
dgv.datasource = datatable
dgv.columns.add("test","testHeader")
The column index of test column should be the last index. However, I found the column index is 0 and the original 0th index turns to 1
测试列的列索引应该是最后一个索引。但是，我发现列索引为 0，而原来的第 0 个索引变为 1
I am not sure what happened. Is there any factor could cause this problem? property settings of datagridview is wrong?
我不确定发生了什么。是否有任何因素可能导致此问题？datagridview的属性设置有误？
回答by Aousaf rashid
It's simple , get the total column count first and then add the column at the end :
很简单，先获取总列数，然后在最后添加列：
Dim col as New DataGridViewColumn
col.HeaderText = "abc"
dgv.Columns.Insert(dgv.ColumnCount, col)
If the above code doesn't help , try adding column to the IDataTableitself :
如果上面的代码没有帮助，请尝试向其IDataTable本身添加列：
datatable.Columns.Add("Header text", GetType(System.String)).SetOrdinal(datatable.Columns.Count)
回答by PANDA MAN
Your code
你的代码
adapter.fill(datatable)
dgv.datasource = datatable
dgv.columns.add("test","testHeader")
seems to be working properly. I guess you are re-filling the datagridview that's why the added column is in index 0.
似乎工作正常。我猜您正在重新填充 datagridview，这就是为什么添加的列在索引 0 中的原因。
try to add
尝试添加
dgv.DataSource = Nothing
you will notice that the added column "test","testHeader" will be in index 0. setting again
您会注意到添加的列“test”，“testHeader”将在索引 0 中。再次设置
dgv.datasource = datatable
will cause the added column to remain at index 0 while the datatable will be added to the succeeding columns.
将导致添加的列保留在索引 0，而数据表将添加到后续列。
回答by PavlinII
There's a DataGridViewColumn.DisplayedIndexproperty to control order of visible columns.
有一个DataGridViewColumn.DisplayedIndex属性来控制可见列的顺序。
Keep in mind that DataGridView tracks theese values and update them for other columns in your grid. Chaning some of them to 0 will update all other columns to highter values.
请记住，DataGridView 会跟踪这些值并为网格中的其他列更新它们。将其中一些更改为 0 会将所有其他列更新为更高的值。
