我使用BindingSource的AddNew()方法来新增记录,结果出错.代码如下:
// 工具栏中"保存"按钮的Click Event
private void tsbSave_Click(object sender, EventArgs e)
{
if (this.currentState == interfaceState.AddState)
{
this.bsEmployees.AddNew();
}
this.bsEmployees.EndEdit();
this.sdaEmployees.Update(this.dsHrm.Tables["Employees"]);
this.currentState = interfaceState.BrowseState;
this.controlsState(this.currentState);
}


// 用户在BindingSource上调用AddNew时引发的事件
private void bsEmployees_AddingNew(object sender, AddingNewEventArgs e)
{
Hashtable newRow = new Hashtable();
newRow["E_ID"] = this.tbE_ID.Text.Trim();
newRow["E_Name"] = this.tbE_Name.Text.Trim();
newRow["E_Code"] = this.tbE_Code.Text.Trim();
newRow["E_Gender"] = this.cbE_Gender.SelectedIndex.ToString();
newRow["E_Birthday"] = this.dtpE_Birthday.Value.ToShortDateString();
newRow["E_UID"] = this.tbE_UID.Text.Trim();
newRow["E_FSchool"] = this.tbE_FSchool.Text.Trim();
newRow["E_Speciality"] = this.tbE_Speciality.Text.Trim();
newRow["E_Address"] = this.tbE_Address.Text.Trim();
newRow["E_Guardian"] = this.tbE_Guardian.Text.Trim();
newRow["E_LinkTel"] = this.tbE_LinkTel.Text.Trim();
newRow["E_InFactory"] = this.dtpE_InFactory.Value.ToShortDateString();
e.NewObject = newRow;
}

错误信息:

你添加的和数据库中的字段类型不一致.

楼上说得对！
特别注意你的
newRow["E_ID"] = this.tbE_ID.Text.Trim();
newRow["E_Code"] = this.tbE_Code.Text.Trim();
newRow["E_Gender"] = this.cbE_Gender.SelectedIndex.ToString();
newRow["E_Birthday"] = this.dtpE_Birthday.Value.ToShortDateString();
newRow["E_UID"] = this.tbE_UID.Text.Trim();
newRow["E_FSchool"] = this.tbE_FSchool.Text.Trim();
newRow["E_Speciality"] = this.tbE_Speciality.Text.Trim();
newRow["E_Guardian"] = this.tbE_Guardian.Text.Trim();
newRow["E_InFactory"] = this.dtpE_InFactory.Value.ToShortDateString();

这个值的类型！

关于AddNew()的问题已解决,是AddingNew事件中的的代码有错误,便现在更新后仍有一个问题.无法更新到源数据表中.

代码如下:
// 工具栏中"添加"按钮的Click Event
private void tsbAdd_Click(object sender, EventArgs e)
{
this.currentState = interfaceState.AddState;
this.clearBindingPage(); // 调用自定义方法,清除TabPage页面中各控件与数据的绑定
this.initialTabPage(); // 调用自定义方法,用除初始化TabPage页面中各控件的数据
this.controlsState(this.currentState);
}

// 工具栏中"编辑"按钮的Click Event
private void tsbEdit_Click(object sender, EventArgs e)
{
this.currentState = interfaceState.EditState;
this.controlsState(this.currentState);
}

// 工具栏中"删除"按钮的Click Event
private void tsbDelete_Click(object sender, EventArgs e)
{

}

// 工具栏中"保存"按钮的Click Event
private void tsbSave_Click(object sender, EventArgs e)
{
if (this.currentState == interfaceState.AddState)
{
this.bsEmployees.AddNew();
}
this.bsEmployees.EndEdit();
this.currentState = interfaceState.BrowseState;
this.controlsState(this.currentState);
this.bindingPage(); // 调用自定义方法，用于恢复tabPage上各控件与数据的绑定
}

// 用户在BindingSource上调用AddNew时引发的事件
private void bsEmployees_AddingNew(object sender, AddingNewEventArgs e)
{
BindingSource bs = (BindingSource)sender;
DataView view = (DataView)bs.List;
DataRowView newRow = view.AddNew();
newRow["E_ID"] = this.tbE_ID.Text.Trim();
newRow["E_Name"] = this.tbE_Name.Text.Trim();
newRow["E_Code"] = this.tbE_Code.Text.Trim();
newRow["E_Gender"] = this.cbE_Gender.SelectedIndex.ToString();
newRow["E_Birthday"] = this.dtpE_Birthday.Value.ToShortDateString();
newRow["E_UID"] = this.tbE_UID.Text.Trim();
newRow["E_FSchool"] = this.tbE_FSchool.Text.Trim();
newRow["E_Speciality"] = this.tbE_Speciality.Text.Trim();
newRow["E_Address"] = this.tbE_Address.Text.Trim();
newRow["E_Guardian"] = this.tbE_Guardian.Text.Trim();
newRow["E_LinkTel"] = this.tbE_LinkTel.Text.Trim();
newRow["E_InFactory"] = this.dtpE_InFactory.Value.ToShortDateString();
e.NewObject = newRow;
}

?更新的语句搞出来看看啊!你可能连接数据库没有搞好!

TO:5楼.

但是如果我使用"编辑"后再保存,修改后的数据能保存到原数据表中..

问题找了出来了,是因为我的"性别"栏中,在SqlDataAdapter控件中的Select 语句中用到case 性别 = 1 then '男' else '女' end..但我现在要更新的话,该怎么做?

的架构几乎是万能的，我说一种不太符合软件的减少耦合性的方法：
查询不需要将性别转化为字符串的“男”或“女”，直接将性别内部存储的0或者1绑定到cbE_Gender的SelectedIndex上就可以了。

cbE_Gender.Items.AddRange(new string[]{"男","女"});//默认：1-男，2-女
cbE_Gender.DataBinding.Add("SelectedIndex",bsEmployees,"E_Gander");

如果嫌这种方法太冒险，可以自定义Binding的Format和Parse事件，在Format事件中按照你要显示的格式显示，而在parse事件中按照你要求的格式保存，直接修改e.Value就可以了。
绑定的时候复杂一点，你可以按以下格式设置绑定

Binding bdgE_Gender=new Binding("Text",bsEmployees,"E_Gander");
bdgE_Gender.Format+=new ConvertEventHandler(genderFormat)
bdgE_Gender.Parse+=new ConvertEventHandler(genderParse)
cbE_Gender.DataBinding.Add(bdgE_Gender);

void genderFormat(object sender,ConvertEventArgs e)
{
  if(e.Value==0)
    e.Value="男";
  else
    e.Value="女";
}

void genderParse(object sender,ConvertEventArgs e)
{
  if(e.Value=="男")
    e.Value=0；
  else
    e.Value=1；
}

完全手写的代码，没有地方调试，提供个思路，请勿见笑。