C# 更新数据集的特定列';将表数据转换为SQL数据库
我有一个从我的数据库加载数据的gridview和一个gridview交换函数,在使用列调用“Priority”在行之间交换数据之后,我想将这些更改保存回我的数据库 只有“Priority”列的值将更改,如何仅将数据集表的该列更新到SQL数据库?请大家多多指教,谢谢 代码:C# 更新数据集的特定列';将表数据转换为SQL数据库,c#,asp.net,vb.net,C#,Asp.net,Vb.net,我有一个从我的数据库加载数据的gridview和一个gridview交换函数,在使用列调用“Priority”在行之间交换数据之后,我想将这些更改保存回我的数据库 只有“Priority”列的值将更改,如何仅将数据集表的该列更新到SQL数据库?请大家多多指教,谢谢 代码: Protected Sub Gridviewselectbus_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
Protected Sub Gridviewselectbus_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
If e.CommandName = "Up" Then
Dim index As Int16 = Convert.ToInt16(e.CommandArgument)
If index = 0 Or index = 1 Then
Exit Sub
End If
Dim objCampaignManagementTable As New CampaignManagementBLL
Dim ds As DataSet = objCampaignManagementTable.SelectCampaignManagementTableListing()
Dim dtr As DataRow = ds.Tables(0).Rows(index - 1)
Dim dtrSwap As DataRow = ds.Tables(0).Rows(index - 2)
Dim dc As DataColumn = ds.Tables(0).Columns(6)
'Dim value As Int16 = Convert.ToInt16(dt.Rows(index)("Priority"))
Dim value As Int16 = CType((dtr)(dc), Short)
Dim temp1 As Int16 = value
'Increases the selected row's priority
dtr(dc) = value - 1
'Decreases the priority of the row that is on top of the selected row by assigning
'the original selected row value to it.
dtrSwap(dc) = value
ds.Tables(0).DefaultView.Sort = "Priority"
ds.Tables(0).AcceptChanges()
dtNew = ds.Tables(0).Copy()
uigvList.DataSource = ds.Tables(0)
uigvList.DataBind()
ds.Tables(0).AcceptChanges()
For i As Integer = 0 To uigvList.Rows.Count - 1
dtNew.Rows(i)("Code") = uigvList.Rows(i).Cells(1).Text
dtNew.Rows(i)("Name") = uigvList.Rows(i).Cells(2).Text
dtNew.Rows(i)("Type") = uigvList.Rows(i).Cells(3).Text
dtNew.Rows(i)("ActiveDateFrom") = uigvList.Rows(i).Cells(4).Text
dtNew.Rows(i)("ActiveDateTo") = uigvList.Rows(i).Cells(5).Text
dtNew.Rows(i)("Priority") = uigvList.Rows(i).Cells(6).Text
Next
' Update database
End if
If e.CommandName = "down" Then
' Down code here
End Sub
看看这段代码,这只会更新特定列,然后还会更新sql server数据库 我希望这对你有帮助 注:catDA表示数据适配器…这是唯一的示例…如何更新
catDA.UpdateCommand = new OdbcCommand("UPDATE Categories SET CategoryName = ? " +
"WHERE CategoryID = ?" , nwindConn);
catDA.UpdateCommand.Parameters.Add("@CategoryName", OdbcType.VarChar, 15, "CategoryName");
OdbcParameter workParm = catDA.UpdateCommand.Parameters.Add("@CategoryID", OdbcType.Int);
workParm.SourceColumn = "CategoryID";
workParm.SourceVersion = DataRowVersion.Original;
DataSet catDS = new DataSet();
catDA.Fill(catDS, "Categories");
DataRow cRow = catDS.Tables["Categories"].Rows[0];
cRow["CategoryName"] = "New Category";
DataRow[] modRows = catDS.Tables["Categories"].Select(null, null, DataViewRowState.ModifiedCurrent);
catDA.Update(modRows);
出于好奇,为什么在这里?