在C#中 int id = Convert.ToInt32(dataGridView1.SelectedRows[0].Cells_百度知道
在C#中 int id = Convert.ToInt32(dataGridView1.SelectedRows[0].Cells
有知道的请给我讲一下吧，谢谢了！
我有更好的答案
LZ一般来说格式应该是： int id=Convert.ToInt32(dataGridView1.SelectedRows[0].Cells[0].value.ToString())讲解一下意思：Convert.ToInt32(Object Value)是将Value转换为Int类型.SelectedRow[int value]选择dataGridView中的第Value行Cells[int value]需要先指定某一行，获得该行的单元格数据集（C即Cells）。然而指定某一具体单元格就需要指明下标（即Value）。 Value 即获得对应数据.ToString()应该不需要人解释了吧？希望能够 对你有帮助！
采纳率：28%
Convert.ToInt32转换成 INT 类型dataGridView1.SelectedRows[0]
选择 第一 行。再.cells 选择列你这个代码有问题吧…… 没拷贝全 就发上来了。
选择datagrid第一行的列，后面应该是按照索引或者字段来检索的条件，并将值转换为int型。
很简单 意思就是 根据选择gridview行的列值 强制转换成int型然后赋值给 int 的id
你没有copy全获取dataGridView1的第一行的网格数组中的第几个网格中的值。并把其转为int32格式
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我们会通过消息、邮箱等方式尽快将举报结果通知您。写了一段C#代码，总是出现问题，是不是dataGridView1.SelectedRows[i].Cells[1].Value.ToString() 有问题_百度知道
写了一段C#代码，总是出现问题，是不是dataGridView1.SelectedRows[i].Cells[1].Value.ToString() 有问题
for (int i = 0; i &dataGridView1.Rows.C i++)
if ((bool)dataGridView1.Rows[i].Cells[0].EditedFormattedValue == true)
{ //添加图书信息SQL语句
sb.Append(&delete...
我有更好的答案
dataGridView1.SelectedRows[i].Cells[1].Value.ToString()改为dataGridView1.Rows[i].Cells[1].Value.ToString()
采纳率：24%
//将for循环改成这样for (int i = 0; i &dataGridView1.SelectedRows.C i++) {
//这个if语句也要改一下
if ((bool)dataGridView1.SelectedRows[i].Cells[0].EditedFormattedValue == true)
{ //添加图书信息SQL语句
sb.Append(&delete
from bookinfo where id='&
+ dataGridView1.SelectedRows[i].Cells[1].Value.ToString() + &';&);}DataGridView中选中的行总是会&=总行数的或者改成下面这样也可以for (int i = 0; i &dataGridView1.Rows.C i++) {
//这个if语句也要改一下
if ((bool)dataGridView1.Rows[i].Cells[0].EditedFormattedValue == true)
{ //添加图书信息SQL语句
sb.Append(&delete
from bookinfo where id='&
+ dataGridView1.Rows[i].Cells[1].Value.ToString() + &';&);}
i的范围是从0到最后1行。也许没有选中全部行，譬如说只选中了1,2行，dataGridView1.SelectedRows，就是1个维数为2的数组，那么i=3时，dataGridView1.SelectedRows[3],这个数组的索引就超出了范围
我觉得可能是你的逻辑有点问题，上面循环的是数据集合的行，但是下面取得是选中的行，如果你没有选择任何行的话，可能就会报这个错误吧。
datagridview默认的是行首选择，也就是说整行都高亮才称为“选中”，重新选择试试。另外，应该先判断选中的行数是否大于0.
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我们会通过消息、邮箱等方式尽快将举报结果通知您。private void dgv_CellClick函数为何失效解决方法 - C#当前位置:& &&&private void dgv_CellClick函数为何失效解决方法private void dgv_CellClick函数为何失效解决方法www.MyException.Cn&&网友分享于：&&浏览：3次private void dgv_CellClick函数为何失效程序功能要求：单击dgv中的选择框选择某一行，将其中各单位格的数据赋值给已有变量。程序代码如下：private void dgv_ShowAllReader_CellClick(object sender, DataGridViewCellEventArgs e) &
#region 获取dgv表中被选中修改读者的当前基本信息，赋值给已有相应变量 &
if (e.ColumnIndex == 0) // 选中某一确定读者基本信息 &
update_readerid = Convert.ToInt32(this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[&READER_ID&].Value.ToString()); &
update_readername = this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[&READER_NAME&].Value.ToString(); &
update_studentnum = this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[& STUDENT_NUM&].Value.ToString(); &
update_idcard = this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[&ID_CARD&].Value.ToString(); &
update_readertype = this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[&READER_TYPE_NAME&].Value.ToString(); &
update_readersex = this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[&READER_SEX&].Value.ToString(); &
update_readertell = this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[&READER_TELL&].Value.ToString(); &
update_canborrowmax = Convert.ToInt32(this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[&MAXNUM_CAN_BORROW&].Value.ToString()); &
update_borrowflag = this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[&READER_FLAG_BORROW&].Value.ToString(); &
update_readertext = this.dgv_ShowAllReader.Rows[e.RowIndex].Cells[&READER_INFO&].Value.ToString(); &
#endregion &
}程序运行后，各变量的值无任何改变，为什么？------解决方案--------------------单步一下看看单元格的值有没有取到呗
------解决方案--------------------积分分分分分。。。。。。。。。。
------解决方案-------------------- if (e.ColumnIndex == 0) 这个条件满足么
------解决方案--------------------条件改下试试，if（e.IsSelected==ture）
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12345678910 上一篇：下一篇：文章评论相关解决方案 12345678910 Copyright & &&版权所有winforms - RowLeave Event - Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function - Stack Overflow
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I have DataGridView Control in windows application.
I load data and bind it to grid using above code.
private void LoadData()
clsData objData = new clsData();
DataTable dtTemp = new System.Data.DataTable();
dtTemp = objData.GetDatatable(" SELECT [ID],[CustomerName],[OrderQty],[Price],[POStatus],[Remarks],[EstdShipDate],[ActualShipDate],[IsShipped]
FROM [tblPO] ");
dgPO.DataSource =
dgPO.DataSource = dtT
where dgPO is DataGrdiView(DGV).
Now i want to update records in DGV when user leaves the row.
for it i have used RowLeave event of DGV.code is here
private void dgPO_RowLeave(object sender, DataGridViewCellEventArgs e)
int POId = Convert.ToString(dgPO.Rows[e.RowIndex].Cells[0].Value) == "" ? 0 : Convert.ToInt32(dgPO.Rows[e.RowIndex].Cells[0].Value);
string CustName = Convert.ToString(dgPO.Rows[e.RowIndex].Cells[1].Value);
int Qty = Convert.ToInt32(dgPO.Rows[e.RowIndex].Cells[2].Value);
decimal Price = Convert.ToDecimal(dgPO.Rows[e.RowIndex].Cells[3].Value);
string Status = Convert.ToString(dgPO.Rows[e.RowIndex].Cells[4].Value);
string Remarks = Convert.ToString(dgPO.Rows[e.RowIndex].Cells[5].Value);
string dtEsdt = Convert.ToDateTime(dgPO.Rows[e.RowIndex].Cells[6].Value).ToString("yyyy-MM-dd");
string dtActl = Convert.ToDateTime(dgPO.Rows[e.RowIndex].Cells[7].Value).ToString("yyyy-MM-dd");
bool Shipped = dgPO.Rows[e.RowIndex].Cells[8].Value == DBNull.Value ? false : Convert.ToBoolean(dgPO.Rows[e.RowIndex].Cells[8].Value);
string strQry = "";
if (POId & 0)
strQry = " UPDATE [tblPO] SET [CustomerName] = '" + PreString(CustName) + "',[OrderQty] = " + Qty + ",[Price] = " + Price + ",[POStatus] = '" + Status + "'";
strQry = strQry + ",[Remarks] = '" + PreString(Remarks) + "',[EstdShipDate] = '" + dtEsdt + "',[ActualShipDate] = '" + dtActl + "',[IsShipped] = '" + Shipped + "'";
strQry = strQry + " WHERE ID =" + POId;
strQry = " INSERT INTO [tblPO] ([CustomerName],[OrderQty],[Price],[POStatus],[Remarks],[EstdShipDate],[ActualShipDate],[IsShipped]) ";
strQry += " VALUES('" + PreString(CustName) + "'," + Qty + "," + Price + ",'" + PreString(Status) + "','" + PreString(Remarks) + "'";
strQry += " ,'" + PreString(dtEsdt) + "','" + PreString(dtActl) + "','" + Shipped + "')";
clsData objData = new clsData();
if (objData.ExecuteQuery(strQry))
LoadData();
When data is updated in DB, I refresh the DGV by calling LoadData method.
At this point, i get an error message like this.
"Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function"
I tried for available solution on SO and MSDN blogs,but they don't work for me
like these
Help needed.
Thanks in advance !!
1,65462140
private void dgPO_RowLeave(object sender, DataGridViewCellEventArgs e)
dataGridView1.EndEdit();
//You code below
Suggestion: The alternative way
Did you try to use
private void dataGridView1_RowValidating(object sender, DataGridViewCellCancelEventArgs e)
if (dataGridView1.IsCurrentRowDirty)
//Your code here
5,97651834
use the following check before applying your edit in the "RowLeave" or "EndEdit" method:
public void dgPO_RowLeave(object sender, DataGridViewCellEventArgs e)
if (!dgPO.Rows[e.RowIndex].Cells[e.ColumnIndex].Selected)
//...rest of your code to apply edit below...
This should work with any cell being edited.(the edit-code is not appli Typing Enter would suffice to apply the edit)
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Stack Overflow works best with JavaScript enabled求解.net datagridview[i,e.rowindex].tooltiptext 延长显示时间。
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不懂如何设置tooltiptext延长显示时间，求大神帮忙。###privatevoidtimer1_Tick(objectsender,EventArgse){toolTip1.Active=fal
问题描述不懂如何设置tooltiptext延长显示时间，求大神帮忙。解决方案解决方案二：privatevoidtimer1_Tick(objectsender,EventArgse){toolTip1.Active=toolTip1.Active=}把timer控件的时间设置长一点试试。解决方案三：privatevoidmyRadGridView1_ToolTipTextNeeded(objectsender,Telerik.WinControls.ToolTipTextNeededEventArgse){ToolTiptoolTip=this.myRadGridView1.ElementTree.ComponentTreeHandler.Behavior.ToolTtoolTip.AutoPopDelay=2000;e.ToolTipText="Hello";}privatevoidradGridView_ToolTipTextNeeded(objectsender,ToolTipTextNeededEventArgse){RadElementelement=senderasRadEif(element==null){}ComponentBehaviorbehavior=(element.ElementTree.ComponentTreeHandlerasIComponentTreeHandler).BPropertyInfotoolTipProperty=typeof(ComponentBehavior).GetProperty("ToolTip",BindingFlags.NonPublic|BindingFlags.Instance|BindingFlags.GetProperty);objecttoolTip=toolTipProperty.GetValue(behavior,null);TyperadToolTipType=toolTip.GetType();PropertyInfoautomaticProperty=radToolTipType.GetProperty("AutomaticDelay");PropertyInfoautoPopDelayProperty=radToolTipType.GetProperty("AutoPopDelay");PropertyInfoinitialDelayProperty=radToolTipType.GetProperty("InitialDelay");PropertyInforeshowDelayProperty=radToolTipType.GetProperty("ReshowDelay");intautomaticDelay=;intautoPopDelay=;intinitialDelay=;intreshowDelay=;automaticProperty.SetValue(toolTip,automaticDelay,null);autoPopDelayProperty.SetValue(toolTip,autoPopDelay,null);initialDelayProperty.SetValue(toolTip,initialDelay,null);reshowDelayProperty.SetValue(toolTip,reshowDelay,null);e.ToolTipText="Thisistooltiptext";}解决方案四：上面两种方法试过，不行啊!解决方案五：privatevoiddgvData_RowEnter(objectsender,DataGridViewCellEventArgse){try{for(inti=0;i&dgvData.Rows[e.RowIndex].Cells.Ci++){StringBuildersbder=newStringBuilder();sbder.AppendFormat("行数据基本信息:rnt");for(intj=0;j&dgvData.Rows[e.RowIndex].Cells.Cj++){if(dgvData.Columns[j].Visible){DataGridViewCellcell=dgvData.Rows[e.RowIndex].Cells[j];if(cell.Value.ToString()!=string.Empty){sbder.AppendFormat("{0}:{1}rnt",dgvData.Columns[j].HeaderText,cell.Value.ToString());}}}dgvData[i,e.RowIndex].ToolTipText=sbder.ToString();}}catch{}}要延长这个显示时间解决方案六：lz是想直接修改datagridview的某个参数达到目的，这可能需要你自己编写一个继承类，应当也可以实现，那样以后就方便了！
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